Used Hand Hydraulic Pump 650 Bar With Cylinder for sale (39,736)

  • Sort results

  • Lowest price Highest price
  • Newest listings Oldest listings
  • Shortest distance Farthest distance
  • Newest year of manufacture Oldest year of manufacture
  • Latest update Oldest update
  • Manufacturer A to Z Manufacturer Z to A
  • Relevance
Lowest price
Price
Highest price
Price
Newest listings
Release date
Oldest listings
Release date
Shortest distance
Distance
Farthest distance
Distance
Newest year of manufacture
Year of construction
Oldest year of manufacture
Year of construction
Latest update
Update
Oldest update
Update
Manufacturer A to Z
Manufacturer
Manufacturer Z to A
Manufacturer
designation from A to Z
Description
designation from Z to A
Description
Model from A to Z
Model
Model from Z to A
Model
Lowest reference
Ref.No.
Highest reference
Ref.No.
Shortest runtime
Runtime
Longest duration
Runtime
Relevance
Relevance
Listing
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
Hydraulic pump unit  Hydraulic power unit
more images
Hungary Tatabánya
1,982 km

Hydraulic pump unit
Hydraulic power unit

Certified Dealer
Call
Listing
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
Hydraulic power unit 700 bar FAG Kugelfischer 1,5 kW
more images
Germany Wiefelstede
1,085 km

Hydraulic power unit 700 bar
FAG Kugelfischer1,5 kW

Certified Dealer
Call
Listing
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023 Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
more images
Poland Wymysłów
1,785 km

12V Hydraulic Power Unit DANA Brevini | 0.7 kW | 190 bar | 2L | 2023
Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023Agregat hydrauliczny 12V DANA Brevini | 0.7 kW | 190 bar | 2L | 2023

Certified Dealer
Call
Listing
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high- WEBER E45 / 59600.0 -- SP30 / 59 198.0
more images
Germany Hessisch Lichtenau
1,244 km

High-pressure hydraulic power unit up to 630 bar, hydraulic spreader jaws, hydraulic spreader, high-
WEBERE45 / 59600.0 -- SP30 / 59 198.0

Certified Dealer
Call
Listing
Hydraulic pump GRUNDFOS 3HN00202 W1
Hydraulic pump GRUNDFOS 3HN00202 W1
Hydraulic pump GRUNDFOS 3HN00202 W1
more images
Germany Wiesbaden
1,190 km

Hydraulic pump
GRUNDFOS3HN00202 W1

Certified Dealer
Call
Listing
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
Hydraulic pump,bosch rexroth a2v Bosch Rexroth A2V 1000
more images
Hungary Tatabánya
1,982 km

Hydraulic pump,bosch rexroth a2v
Bosch RexrothA2V 1000

Certified Dealer
Call
Listing
Hydraulic pump unit ROEMHELD
Hydraulic pump unit ROEMHELD
Hydraulic pump unit ROEMHELD
Hydraulic pump unit ROEMHELD
more images
Germany Germany
1,228 km

Hydraulic pump unit
ROEMHELD

Certified Dealer
Call
Listing
Hydraulic Pumps Unit HYDAC CA2R05H07.4-155-03-20X
Hydraulic Pumps Unit HYDAC CA2R05H07.4-155-03-20X
Hydraulic Pumps Unit HYDAC CA2R05H07.4-155-03-20X
more images
Germany Ennepetal
1,084 km

Hydraulic Pumps Unit
HYDACCA2R05H07.4-155-03-20X

Certified Dealer
Call
Listing
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
Hydraulic Pumps Unit FLUIDSYSTEME DASBECK 400l - Sofort einsatzbereit
more images
Germany Ennepetal
1,084 km

Hydraulic Pumps Unit
FLUIDSYSTEME DASBECK400l - Sofort einsatzbereit

Certified Dealer
Call
Listing
Hydraulic pump Breitenbach HY15-2467
Hydraulic pump Breitenbach HY15-2467
Hydraulic pump Breitenbach HY15-2467
Hydraulic pump Breitenbach HY15-2467
Hydraulic pump Breitenbach HY15-2467
more images
Germany Dietfurt an der Altmühl
1,464 km

Hydraulic pump
BreitenbachHY15-2467

Call
Listing
Hydraulic cylinder unbekannt Hub 250 mm
Hydraulic cylinder unbekannt Hub 250 mm
Hydraulic cylinder unbekannt Hub 250 mm
Hydraulic cylinder unbekannt Hub 250 mm
Hydraulic cylinder unbekannt Hub 250 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
unbekanntHub 250 mm

Certified Dealer
Call
Listing
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
Hydraulic Pumps Unit NACHI Hydraulikaggregat NACHI S-0265
more images
Germany Ennepetal
1,084 km

Hydraulic Pumps Unit
NACHIHydraulikaggregat NACHI S-0265

Certified Dealer
Call
Listing
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
Double hydraulic pump Bosch 0     0
more images
Germany Wiefelstede
1,085 km

Double hydraulic pump
Bosch0 0

Certified Dealer
Call
Listing
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
Tractor Unit MAN TGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES
more images
Germany Germany
1,293 km

Tractor Unit
MANTGX 18.480 4x2 BLS WITH TIPPER HYDRAULIC AND GOOD TIRES

Certified Dealer
Call
Listing
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
more images
Germany Dorsten
1,046 km

Hydraulic Pumps Unit
MANNESMANN REXROTHHydraulik

Call
Listing
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
Hydraulic Pumps Unit MANNESMANN REXROTH Hydraulik
more images
Germany Dorsten
1,046 km

Hydraulic Pumps Unit
MANNESMANN REXROTHHydraulik

Call
Listing
Hydraulic cylinder GSL German Standard Lift D120050  Hub 385 mm
Hydraulic cylinder GSL German Standard Lift D120050  Hub 385 mm
Hydraulic cylinder GSL German Standard Lift D120050  Hub 385 mm
Hydraulic cylinder GSL German Standard Lift D120050  Hub 385 mm
Hydraulic cylinder GSL German Standard Lift D120050  Hub 385 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
GSL German Standard LiftD120050 Hub 385 mm

Certified Dealer
Call
Listing
Hydraulic cylinder unbekannt Hub 130 mm
Hydraulic cylinder unbekannt Hub 130 mm
Hydraulic cylinder unbekannt Hub 130 mm
Hydraulic cylinder unbekannt Hub 130 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
unbekanntHub 130 mm

Certified Dealer
Call
Listing
Hydraulic pump for Krauss Maffei Rexroth R901288345 SY2DFEE-21/071-045
Hydraulic pump for Krauss Maffei Rexroth R901288345 SY2DFEE-21/071-045
Hydraulic pump for Krauss Maffei Rexroth R901288345 SY2DFEE-21/071-045
Hydraulic pump for Krauss Maffei Rexroth R901288345 SY2DFEE-21/071-045
more images
Germany Halver
1,098 km

Hydraulic pump for Krauss Maffei
RexrothR901288345 SY2DFEE-21/071-045

Certified Dealer
Call
Listing
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit RACINE / VICKERS PVQ-PSS=-06CR-J11
more images
Germany Hessisch Lichtenau
1,244 km

Hydraulic power unit with hydraulic pump, hydraulic power unit with vane pump, hydraulic unit
RACINE / VICKERSPVQ-PSS=-06CR-J11

Certified Dealer
Call
Listing
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump BOSCH REXROTH / HYDRONORMA 1PV2V3-40/25RA01MC63A1
more images
Germany Hessisch Lichtenau
1,244 km

Hydraulic unit with hydraulic pump, hydraulic power unit, hydraulic aggregate with vane pump
BOSCH REXROTH / HYDRONORMA1PV2V3-40/25RA01MC63A1

Certified Dealer
Call
Siegel

Trust Seal

Dealers certified through Machineseeker

Trust Seal
Listing
Hydraulic cylinder unbekannt Hub 200 mm
Hydraulic cylinder unbekannt Hub 200 mm
Hydraulic cylinder unbekannt Hub 200 mm
Hydraulic cylinder unbekannt Hub 200 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
unbekanntHub 200 mm

Certified Dealer
Call
Listing
Hydraulic cylinder unbekannt Hub 560 mm
Hydraulic cylinder unbekannt Hub 560 mm
Hydraulic cylinder unbekannt Hub 560 mm
Hydraulic cylinder unbekannt Hub 560 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
unbekanntHub 560 mm

Certified Dealer
Call
Listing
Hydraulic cylinder Atlantic ATS 3006  Hub 220 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 220 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 220 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 220 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 220 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
AtlanticATS 3006 Hub 220 mm

Certified Dealer
Call
Listing
Hydraulic cylinder Atlantic ATS 3006  Hub 200 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 200 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 200 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 200 mm
Hydraulic cylinder Atlantic ATS 3006  Hub 200 mm
more images
Germany Wiefelstede
1,085 km

Hydraulic cylinder
AtlanticATS 3006 Hub 200 mm

Certified Dealer
Call

This may be of interest to you

Machineseeker Group Aquire Gebrauchtmaschinen.de Used-machines.com

Machineseeker Group acquires the platforms used-machines.com and Gebrauchtmaschinen.de

Machineseeker Auctions

Sales with maximum attention: Selected auction highlights

Strongest Forklift Trucks

Photo gallery: the 10 strongest forklift trucks in the world

Sell more machines!

Sell now on Machineseeker! Over 250,000 inquiries per month

Machinseeker Olympic Games

Olympic Games: Machineseeker supports “Team Germany” in Paris

Tricks for buying used machines

10 valuable tricks for buying used machines online