Generator Sets For Sale

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

Search new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Filter by hours, price, or year to find the right Generator near you today.
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 1,898 Generator Listings

1 - 25 of 1,898 listings
1 - 25 of 1,898 listings
Featured Item
2018 Atlas Copco QAS45T4FNB Generator

2018 Atlas Copco QAS45T4FNB Generator

Recently Updated
$15,000 USD
THIS ITEM IS BEING AUCTIONED FROM THE THOMAS HIRCHAK COMPANY IN MORRISVILLE, VT ITEM IS LOCATED AT 1878 CADYS FALLS ROAD IN MORRISVILLE, VT 05661. Online Auction Closes:Monday, December 29...
ConditionUsed
Usage1,357 Hours
MLS Number14025164
CategoryGenerator Sets
Last Updated12/30/2025
Location
Morrisville, VT, US
Sold By
Thomas Hirchak Company
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 Updated12/11/2025
Location
Pompano Beach, FL, US
Sold By
Pro Quip
Featured Item
Used Like NEW Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NON DEF!

Used Like NEW Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NON DEF!

$20,000 USD
FREE SHIPPING! (to most US states) NEW! Generator 20 KW 2022 Allmand Maxi-Power25 Diesel Portable Trailer Mounted LOW HOURS!! NOW OFFERING EASY BUSINESS OR PERSONAL FINANCING! WE TAKE...
ConditionUsed
Usage2 Hours
Stock NumberTC1025472104DS200
MLS Number13953991
CategoryGenerator Sets
Last Updated12/22/2025
Location
Orem, UT, US
Sold By
Global Remarketing
Caterpillar XQ230KVA Generator

2023 Caterpillar XQ230KVA Generator

Recently Updated
$89,500 USD
(480/277 VOLT,, (ModbusTCP) and, (NON-ROAD), *CERTIFICATION AR, *CONNECTION GP, *END USE: EP RETAIL RENTAL, *ENGINE ARPRIME, *GENERAL AR, *GENERATOR ARPWR, *MODULE AR DEF, *MODULE AR EXH,...
ConditionUsed
Usage3,603 Hours
Stock NumberUEN233
MLS Number12656852
CategoryGenerator Sets
Last Updated1/5/2026
Location
Call Foley, MO, US
Sold By
Foley Equipment
Multiquip DCA150SS Generator

2023 Multiquip DCA150SS Generator

Recently Updated
$105,000 USD
BALL COUPLER 2 5/16 14K, BATT CHG 10A, CCV HEATER, ENGINE S/N PE6068U111751, JOHN DEERE TIER 4F ENV, KIT POWERBALANCE, TRAILER DCA150-180SSJU4F3 ELEC, VIN # 5SLBG1820PL042946,
ConditionUsed
Usage1,135 Hours
Stock Number7601385
MLS Number12261372
CategoryGenerator Sets
Last Updated1/5/2026
Location
Casper, WY, US
Sold By
Wyoming Machinery Company
Caterpillar XQ35KVA Generator

2020 Caterpillar XQ35KVA Generator

Recently Updated
$27,200 USD
3 PHASE NEMA LOCK RECEPTACLE, 3POLE CB W/ CAMLOCK CONNT OPTION, 60 HZ 27 KW, 60HZ 480 VOLT (WYE), 80C TEMP RISE OVER 40C AMB, ALT SPACE HEATER, Base Type - Standard, BATTERY CHARGER UL10A...
ConditionUsed
Usage3,298 Hours
Stock NumberWEU0054
MLS Number12224717
CategoryGenerator Sets
Last Updated1/5/2026
Location
Topeka, KS, US
Sold By
Foley Equipment
Caterpillar XQ35KVA Generator

2020 Caterpillar XQ35KVA Generator

Recently Updated
$19,600 USD
3 PHASE NEMA LOCK RECEPTACLE, 3POLE CB W/ CAMLOCK CONNT OPTION, 60 HZ 27 KW, 60HZ 480 VOLT (WYE), 80C TEMP RISE OVER 40C AMB, ALT SPACE HEATER, Base Type - Standard, BATTERY CHARGER UL10A...
ConditionUsed
Usage7,297 Hours
Stock NumberWEU0056
MLS Number12224697
CategoryGenerator Sets
Last Updated1/5/2026
Location
Topeka, KS, US
Sold By
Foley Equipment
Caterpillar XQ35KVA Generator

2020 Caterpillar XQ35KVA Generator

Recently Updated
$21,900 USD
3 PHASE NEMA LOCK RECEPTACLE, 3POLE CB W/ CAMLOCK CONNT OPTION, 60 HZ 27 KW, 60HZ 480 VOLT (WYE), 80C TEMP RISE OVER 40C AMB, ALT SPACE HEATER, Base Type - Standard, BATTERY CHARGER UL10A...
ConditionUsed
Usage4,665 Hours
Stock NumberWEU0055
MLS Number12257445
CategoryGenerator Sets
Last Updated1/5/2026
Location
Kansas City, MO, US
Sold By
Foley Equipment
Caterpillar XQ570KVA Generator

2023 Caterpillar XQ570KVA Generator

Recently Updated
$293,100 USD
(1150 ft), (Prime), *779 BHP 500 GEN KW W/F 60 HZ S, *CAPTIVE: 5194410C18PS072, *CERTIFICATION AR, *END USE: EP RETAIL RENTAL, *GENERAL AR, *GENERATOR AR POWER, *MODULE AR DEF, *MODULE AR ...
ConditionUsed
Usage740 Hours
Stock NumberUEN239
MLS Number13349508
CategoryGenerator Sets
Last Updated1/5/2026
Location
Wichita, KS, US
Sold By
Foley Equipment
Caterpillar C9 Generator

2010 Caterpillar C9 Generator

Recently Updated
$18,500 USD
*OLD* CERTIFIED, 275 EKW W/FAN, 500 GALLON FUEL TANK, 5014J SE GENERATOR REMOVAL, 600 AMP UL 3 POLE 80% CB 76, 60HZ 480 VOLTS, AIR CLEANER-HEAVY DUTY, BATTERY CHARGER-5 AMP 11, BATTERY...
ConditionUsed
Usage11,571 Hours
Stock NumberC9E2284
MLS Number11677802
CategoryGenerator Sets
Last Updated1/5/2026
Location
Rock Springs, WY, US
Sold By
Wyoming Machinery Company
Caterpillar XQ125KVA Generator

2019 Caterpillar XQ125KVA Generator

Recently Updated
$44,600 USD
125C TEMP RISE OVER 40C AMB, 3 PHASE NEMA LOCK RECEPTACLE, 3POLE CB, 480V 60 HZ (XQ125), 60 HZ 100 KW, 60HZ 480 VOLT (WYE), ALT SPACE HEATER, Base Type - Standard, BATTERY CHARGER UL10A...
ConditionUsed
Usage3,486 Hours
Stock NumberVER026
MLS Number13727101
CategoryGenerator Sets
Last Updated1/5/2026
Location
Colby, KS, US
Sold By
Foley Equipment
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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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