Generator Sets For Sale

New or Used Generators (Gen Set) by Owners and Dealers

Browse real listings for new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,599,900. Filter by hours, price, or year to find your perfect Generator.
Generator sets, also known as a "gen set", can provide power to any job site that is not connected to grid, needs an emergency supply, or wants to perform peak shaving. The generators come in various sizes and power ratings. The fuel type of the generator may be diesel, gasoline, or natural gas, and they may be trailer-mounted, mobile, or stationary. If you're looking for just a power unit, browse our industrial power unit section.
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Showing 1 - 25 of 1,986 Generator Listings

1 - 25 of 1,986 listings
1 - 25 of 1,986 listings
Featured Item
Caterpillar 3412 Generator

1995 Caterpillar 3412 Generator

$99,000 USD
Auto Start, Base Tank, Battery Charger, Battery Set, Cat Brand Genset, Circuit Breaker, Control Panel - Other, Enclosure Lights, Enclosure Material - Aluminum, Engine Type - Diesel, EPA...
ConditionUsed
Usage541 Hours
Stock NumberEU00147
MLS Number12740183
CategoryGenerator Sets
Last Updated3/12/2026
Location
Knoxville, TN, US
Sold By
Stowers Power Systems
Featured Item
2023 GENERAC G-25 TRAILER MOUNTED 25KW GENERATOR - ISUZU DIESEL - ONLY 3,000 HOURS - LIKE NEW

2023 GENERAC G-25 TRAILER MOUNTED 25KW GENERATOR - ISUZU DIESEL - ONLY 3,000 HOURS - LIKE NEW

$13,500 USD
PRO-QUIPLLC.COM CALL 954-367-3867 2023 GENERAC MDG25IF4 25KW TRAILER MOUNTED GENERATOR 3 PHASE ISUZU TURBO DIESEL ONLY 3,034 HOURS STILL LIKE NEW 100% RUST FREE AND IMMACULATE FRESH...
ConditionUsed
Usage3,034 Hours
Horse Power49 HP
Engine ModelIsuzu 2.2
Weight2771
Stock Number25 KW - ISUZU TURBO DIESEL - 3 PHASE
MLS Number14021856
CategoryGenerator Sets
Last Updated4/9/2026
Location
Pompano Beach, FL, US
Sold By
Pro Quip
Featured Item
Multiquip DCA150 Generator

2014 Multiquip DCA150 Generator

$45,000 USD
110% Spill Containment, Auto Start, Battery Charger, Battery Disconnect Switch, Camlocks, Emissions Level, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator,...
ConditionUsed
Usage5,147 Hours
Stock NumberE16389
MLS Number13725278
CategoryGenerator Sets
Last Updated3/12/2026
Location
West Columbia, SC, US
Sold By
Blanchard Power Systems
Featured Item
Caterpillar XQ 350 (120-480 V) 350@1800/3/SBY EKW@RPM/PH/R Generator

2014 Caterpillar XQ 350 (120-480 V) 350@1800/3/SBY EKW@RPM/PH/R Generator

$110,000 USD
110% SPILL CONTAINMENT, 3 WAY FUEL VALVE, 60 HZ, AUTO START, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, CAT BRAND GENSET, CAT C13 ENGINE, CATERPILLAR XA350 TIER4I, CIRCUIT BREAKER, CEM,...
Inspection Report
ConditionUsed
Usage6,727 Hours
Stock NumberNR12802
MLS Number13305187
CategoryGenerator Sets
Last Updated3/12/2026
Location
Eugene, OR, US
Sold By
Peterson Power Systems
Featured Item
Caterpillar XQ2000 Mobile Power Module Generator Set

2023 Caterpillar XQ2000 Mobile Power Module Generator Set

$1,200,000 USD
3 Way Fuel Valve, Auto Start, Battery Charger, Camlocks, CE Plate, Emissions Level, Engine Governor, Engine Type - Diesel, Fire Extinguisher, Frequency - 50 / 60 Hz, Fuel Tank Type - Dual...
Inspection Report
ConditionUsed
MLS Number12860680
CategoryGenerator Sets
Last Updated3/12/2026
Location
Fort Myers, FL, US
Sold By
Pantropic Power
Featured Item
Caterpillar XQ 1250 Generator

1990 Caterpillar XQ 1250 Generator

$489,000 USD
Auto Start, Battery Charger, Camlocks, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Fuel Tank Type - Dual Wall, Generator, Hitch, Trailer, Permanent Magnet Generator (PMG),...
Inspection Report
ConditionUsed
Usage670 Hours
MLS Number12860676
CategoryGenerator Sets
Last Updated3/12/2026
Location
Fort Myers, FL, US
Sold By
Pantropic Power
Featured Item
Caterpillar XQ 2000 (277-480 V) 2000@1800/3/SBY EKW@RPM/PH/R Generator

Caterpillar XQ 2000 (277-480 V) 2000@1800/3/SBY EKW@RPM/PH/R Generator

$899,000 USD
60 HZ, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, BRAND NEW CONTAINER, NEW 1250GLS FUEL TANK, NEW HORIZONTAL RADIATOR, NEW EXHAUST SYSTEM, GENSET CONTROL PANEL EMCP 4.4 WITH MULTIFUNCTION...
ConditionUsed
Usage1,000 Hours
MLS Number11819023
CategoryGenerator Sets
Last Updated3/12/2026
Location
Miami, FL, US
Sold By
Pantropic Power
Katolight 40kW Portable Standby Gen Set

Katolight 40kW Portable Standby Gen Set

Newly Listed
At auction Apr. 22
Katolight 40kW Portable Standby Gen Set, 1,885 hrs showing, Official Model: D40FGJ4T2, Engine: John Deere 5030TF270 Diesel, RPM: 1800, KW: 40, HZ: 60, KVA: 40, Volts: 120/240 1P/3P, Wire:...
ConditionUsed
Stock NumberLK7946
MLS Number14304233
CategoryGenerator Sets
Last Updated4/11/2026
Location
Waterloo, NE, US
Listed By
BigIron Auctions
2015 Multiquip WhisperWattDCA-25SSIU4F Generator

2015 Multiquip WhisperWattDCA-25SSIU4F Generator

Newly Listed
At auction Apr. 23
2015 Multiquip WhisperWattDCA-25SSIU4F generator, Hours: 4,414 on meter, Actual hours unknown, Serial: 7151266, Engine, Isuzu 4LE2TDZBA-01, Serial: 4LE2-632401, Displacement: 2.1L,...
ConditionUsed
Usage4,414 Hours
Stock NumberEU8637
MLS Number14304096
CategoryGenerator Sets
Last Updated4/11/2026
Location
Sparks, NV, US
Listed By
Purple Wave Auction
2013 Multiquip DCA-25SSIU4F Generator

2013 Multiquip DCA-25SSIU4F Generator

Newly Listed
At auction Apr. 23
2013 Multiquip DCA-25SSIU4F generator, Hours: 2,883 on meter, Engine, Isuzu BZ-4LE2T, Serial: 4LE2-638119, Displacement: 2.2L, Cylinders: 4, Fuel type: Diesel, Features, Generator, Denying...
ConditionUsed
Usage2,883 Hours
Stock NumberEU8638
MLS Number14304094
CategoryGenerator Sets
Last Updated4/11/2026
Location
Sparks, NV, US
Listed By
Purple Wave Auction
Wacker Neuson G50 Diesel Generator

Wacker Neuson G50 Diesel Generator

Newly Listed
Contact for price
Location: ISA WI Yard - Merrill, WI, John Deere 4045DF270D 4.5L Diesel Engine, 38KW Generator, Single Phase/3 Phase, Trailer Model: MGT2S, Torsion Axle, ST225/75R15 Tires, Hours Shown: 3690...
ConditionUsed
Usage3,690 Hours
Stock Number98284
MLS Number14303644
CategoryGenerator Sets
Last Updated4/10/2026
Location
Merrill, WI, US
Sold By
Integrity Sales and Auction LLC

The Marketplace for Buying and Selling Industrial Generators

A generator set, aka a "gen set", can provide power to any job site that is not connected to grid or otherwise needs an emergency supply. In addition, a gen set can save money by producing power during peak hours when energy costs the most (a practice known as “peak shaving”). We are pleased to offer a huge listing of gas, natural gas, and diesel generator sets for all of your power supply needs.

Choosing the Right Gen Set

A gen set can be split into three main types:

  • Diesel Generator Sets – A diesel genset has better fuel efficiency than a gas gen set, but usually cost more. Earlier models are much noisier than modern versions.
  • Gasoline Generator Sets – Although less expensive than diesel, their components are actually more expensive to replace. More popular than diesel when it comes to intermittent use.
  • Natural Gas – The most expensive gen set to operate is also potentially explosive, so caution must be taken at all times. However, since many buildings have a natural gas line, you usually won’t need to store fuel.

Whether you choose a natural gas, gasoline, or diesel genset, you will need to decide on the best cooling system. Again, there are three types:

  • Air-cooled – The loudest and cheapest cooling system with low maintenance costs (typically received for smaller generator sets).
    Typically used for power levels ranging from 8 to 20 kilowatts.
  • Water-cooled – Larger generator sets require liquid cooling, which is quieter than air, but also more complex and oftentimes messier.
    Typically used for power levels ranging from 25 to 60 kilowatts.
  • Hydrogen – The most powerful gen set is also the most dangerous; hydrogen is highly combustible and most be closely monitored.
    Typically used for power levels above 60 kilowatts.
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