Generator Sets For Sale

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

Find deals on new and used Generator Sets on MyLittleSalesman.com, with prices from $500 to $1,349,900. Use filters for hours, price, or year to compare options.
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 3516C Generator

2014 Caterpillar 3516C Generator

Recently Updated
$1,050,000 USD
134- WEIGHT: 30,000 LBS 158- WEIGHT: 70,000 LBS. SHIP, 2014 CATERPILLAR 3516C, 2500KW STANDBY, 13,800V (6-, 3516C DIESEL ENGINE, 165 HOURS,, AIR CLEANERS, EMCP 4.2 DIGITAL, ALTERNATOR, (3)...
ConditionUsed
Usage165 Hours
Stock NumberYEU0053
MLS Number13717140
CategoryGenerator Sets
Last Updated1/5/2026
Location
Call Foley, KS, US
Sold By
Foley Equipment
Caterpillar 3516C Generator

2014 Caterpillar 3516C Generator

Recently Updated
$1,050,000 USD
134- WEIGHT: 30,000 LBS 158- WEIGHT: 70,000 LBS. SHIP, 2014 CATERPILLAR 3516C, 2500KW STANDBY, 13,800V (6-, 3516C DIESEL ENGINE, 165 HOURS,, AIR CLEANERS, EMCP 4.2 DIGITAL, ALTERNATOR, (3)...
ConditionUsed
Usage165 Hours
Stock NumberYEU0054
MLS Number13717138
CategoryGenerator Sets
Last Updated1/5/2026
Location
Call Foley, KS, US
Sold By
Foley Equipment
Caterpillar D3412 Generator

1999 Caterpillar D3412 Generator

Recently Updated
$99,500 USD
1200AMP MOUNTED CIRCUIT, 23.8 SQ FT RADIATOR, 24V ALTERNATOR, 750KW STANDBY @ 480V, Breaker, EMCP 2 PLUS CONTROLLER, ENCLOSED CAT 3412 PACKAGE, GENERATOR SET, Online Owner's Manual, STANDBY...
ConditionUsed
Usage980 Hours
Stock NumberYEU0049
MLS Number13769273
CategoryGenerator Sets
Last Updated1/5/2026
Location
Topeka, KS, US
Sold By
Foley Equipment
Caterpillar XQ200 Generator

2015 Caterpillar XQ200 Generator

Recently Updated
$126,000 USD
200 KW STANDBY, CAT C7.1 ENGINE, CAT XQ200 T4I PORTABLE, Control Panel - EMCP 4.2, GENERATOR SET, MULTI- VOLTAGE, NEED A KS VIN INSPCT TO FLEETADD, Online Owner's Manual, TRAILER VIN...
ConditionUsed
Usage42 Hours
Stock NumberYEU0018
MLS Number13973070
CategoryGenerator Sets
Last Updated1/5/2026
Location
Kansas City, MO, US
Sold By
Foley Equipment
Caterpillar XQ125 T4F Generator

2019 Caterpillar XQ125 T4F Generator

Recently Updated
$26,500 USD
110% Spill Containment, Auto Start, Battery Charger, Battery Disconnect Switch, Cat Brand Genset, Emissions Level - EPA - EPA TIER 4f, Engine Governor, Engine Type - Diesel, Frequency - 60...
ConditionUsed
Usage14,953 Hours
Stock NumberRP14953
MLS Number13455341
CategoryGenerator Sets
Last Updated1/5/2026
Location
Midland, TX, US
Sold By
Warren Power Systems
Caterpillar 3516C-HD Generator

2008 Caterpillar 3516C-HD Generator

Recently Updated
$925,000 USD
1200 GALLON FUEL TANK, 13.2KV, 13.2KV BREAKER AND MANUAL, 2008 3516C-HD 2500KW, CAT ADVANTAGE WARRANTY, CONTAINER, DISCONNECT, EMCP 3.3, FIRE SUPPRESSION SYSTEM, FOUR AXLE CHASSIS, GENERATOR...
ConditionUsed
Usage200 Hours
Stock NumberYEU0011
MLS Number13418445
CategoryGenerator Sets
Last Updated1/5/2026
Location
Call Foley, KS, US
Sold By
Foley Equipment
Caterpillar GEN/48KW Generator

2019 Caterpillar GEN/48KW Generator

Recently Updated
$27,500 USD
3" PINTLE HOOK, 60HZ 48 KW, ANTI-CONDENSATION HEATER, BATTERY CHARGER UL10A 12, CAT 6KVA TIER 4 FINAL GENSET, CAT C3.4B ENGINE CJ900309, CAT GENERATOR, GENERATOR LSB00988, Jacket Water...
Inspection Report
ConditionUsed
Usage10,629 Hours
Stock Number3190306
MLS Number13274127
CategoryGenerator Sets
Last Updated1/5/2026
Location
Richmond, VA, US
Sold By
Carter Machinery
Onan ONAN GGHH Generator

2006 Onan ONAN GGHH Generator

Recently Updated
Contact for price
Auto Start, Battery Charger, Circuit Breaker, Control Panel - Other, Enclosure Material - Steel, Engine Type - Natural Gas, EPA Stationary Emergency, Frequency - 60 Hz, Generator, Jacket...
ConditionUsed
Stock NumberEU00165
MLS Number13251204
CategoryGenerator Sets
Last Updated1/5/2026
Location
Knoxville, TN, US
Sold By
Stowers Power Systems
Caterpillar 3512C Generator

2013 Caterpillar 3512C Generator

Recently Updated
$369,000 USD
100 GALLON FUEL TANK, 1500KW STANDBY @ 480V, 2013 CAT 3512C PACKAGE, 900KW ONBOARD LOAD BANK, EMCP 4.2 CONTROLLER, EPA TIER 2, GENERATOR SET, MOUNTED CIRCUIT BREAKER, Online Owner's Manual ,...
ConditionUsed
Usage270 Hours
Stock NumberXEU0043
MLS Number13155101
CategoryGenerator Sets
Last Updated1/5/2026
Location
Topeka, 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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