Generator Sets For Sale

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

Find available new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Use filters for hours, price, or year to narrow and find the right Generator available near you.
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 1,947 Generator Listings

1 - 25 of 1,947 listings
1 - 25 of 1,947 listings
Featured Item
2001 Caterpillar 3412PKGG 700KW 480V Generator

2001 Caterpillar 3412PKGG 700KW 480V Generator

$66,000 USD
700Kw standby rated, 635kW prime rated generator set. Generator comes with Sound Attenuated Enclosure and Ground Fault Relay System. 3412 Cat Engine with Regular System Changes every 500 Hrs...
ConditionUsed
Usage9,256 Hours
Engine ModelCaterpillar 3412
MLS Number14146681
CategoryGenerator Sets
Last Updated2/16/2026
Location
Grants Pass, OR, US
Sold By
Private Party
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 Updated2/25/2026
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 Updated2/9/2026
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 Updated2/9/2026
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 Updated2/9/2026
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 Updated2/9/2026
Location
Miami, FL, US
Sold By
Pantropic Power
2011 Doosan G185 Generator

2011 Doosan G185 Generator

Newly Listed
At auction Mar. 26
2011 Doosan G185 generator, Hours: 23,815 on meter, Serial: 425292UDVC28, Engine, John Deere 6068H, Cylinders: 6, Fuel type: Diesel, Features, Generator, Leroy Somer LSA 44.2 L12, kVA: 203...
ConditionUsed
Usage23,815 Hours
Stock NumberEA7220
MLS Number14219311
CategoryGenerator Sets
Last Updated3/3/2026
Location
Corpus Christi, TX, US
Listed By
Purple Wave Auction
Cummins GTA38 Natural Gas Generator

2011 Cummins GTA38 Natural Gas Generator

Recently Updated
$149,900 USD
Cummins 500 kW standby natural gas generator model 500GFGA. Cummins GTA38 engine rated 803 HP at 1800 RPM, SN-25357864. 3/60/277/480V, 12 lead reconnectable to other voltages. 800 Amp...
ConditionUsed
Usage262 Hours
Horse Power803 HP
Engine ModelCummins GTA38
Stock NumberCentral States #4934
MLS Number14129401
CategoryGenerator Sets
Last Updated3/2/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins 750GFLB Natural Gas Generator

2005 Cummins 750GFLB Natural Gas Generator

Recently Updated
$199,900 USD
Cummins 750 kW standby natural gas generator set, model 750GFLB, SN-HA05A350765. Cummins GTA50-G2 engine rated 1220 HP at 1800 RPM, SN-25300650. 3/60/277/480V, 12 lead reconnectable to...
ConditionUsed
Usage1,433 Hours
Horse Power1220 HP
Engine ModelCummins GTA50-G2
Stock NumberCentral States #4913
MLS Number14129348
CategoryGenerator Sets
Last Updated3/2/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Kohler 800 KW Diesel Generator

2008 Kohler 800 KW Diesel Generator

Recently Updated
$149,900 USD
Kohler 800 kW standby (725 kW prime) diesel generator set, model 800REOZMB, SN-2231580. Mitsubishi S12A2-Y2PTAW-2 engine rated 1120 HP at 1800 RPM, SN-26270, EPA Tier 2 emissions. 3/60/277...
ConditionUsed
Usage528 Hours
Horse Power1120 HP
Engine ModelMitsubishi S12A2-Y2PTAW-2
Emission RatingUSA Tier 2
Stock NumberCentral States #4926
MLS Number14129340
CategoryGenerator Sets
Last Updated3/2/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DQDAC Diesel Generator

2026 Cummins DQDAC Diesel Generator

Recently Updated
$92,900 USD
*****ETA March 11, 2026*****New Cummins 300 kW standby (270 kW prime) diesel generator set model DQDAC. Cummins QSL9-G7 engine rated 418 HP at 1800 RPM, EPA Tier 3 emissions. 3/60/120/208V...
ConditionNew
Horse Power418 HP
Engine ModelCummins QSL9-G7
Emission RatingUSA Tier 3
Stock NumberCentral States #4853
MLS Number13884022
CategoryGenerator Sets
Last Updated3/2/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins DQDAC Diesel Generator

2025 Cummins DQDAC Diesel Generator

Recently Updated
$92,900 USD
*****ETA March 11, 2026*****New Cummins 300 kW standby (270 kW prime) diesel generator set model DQDAC. Cummins QSL9-G7 engine rated 418 HP at 1800 RPM, EPA Tier 3 emissions. 3/60/120/208V,...
ConditionNew
Horse Power418 HP
Engine ModelCummins QSL9-G7
Emission RatingUSA Tier 3
Stock NumberCentral States #4815
MLS Number13763038
CategoryGenerator Sets
Last Updated3/2/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Caterpillar XQ125KVA Generator

2020 Caterpillar XQ125KVA Generator

Newly Listed
$69,500 USD
*CERTIFICATION AR, *END USE: EP RENTAL, *ENGINE ARPRIM, *GENERAL AR, *GENERATOR ARPWR, *HEATER GPGENERATOR, *OPTIONAL 208V 3PHASE NEMA REC, *OPTIONAL BATTERY CHARGER UL10A, *PERMANENT MAGNET...
ConditionUsed
Usage567 Hours
Stock NumberZEU0004
MLS Number14200398
CategoryGenerator Sets
Last Updated3/1/2026
Location
Kansas City, MO, US
Sold By
Foley Equipment
Caterpillar XQ230 T4F Generator

2023 Caterpillar XQ230 T4F Generator

Recently Updated
$107,425 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Camlocks, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz,...
ConditionUsed
Usage6,722 Hours
Stock NumberRP15452
MLS Number13885618
CategoryGenerator Sets
Last Updated3/1/2026
Location
Midland, TX, US
Sold By
Warren Power Systems

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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