Generator Sets For Sale

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

Shop new and used Generator Sets on MyLittleSalesman.com, with prices from $200 to $1,599,900. Filter by hours, price, or year to find the right Generator closest to 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 1,917 Generator Listings

1 - 25 of 1,917 listings
1 - 25 of 1,917 listings
Featured Item
Caterpillar XQ125 T4F Generator

2019 Caterpillar XQ125 T4F Generator

$41,250 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Cat Brand Genset, Customer Value Agreement (CVA) 2-year/2,000-hour Customer Value Agreement (CVA), Emissions Level - EPA -...
ConditionUsed
Usage6,694 Hours
Stock NumberRP14959
MLS Number13004413
CategoryGenerator Sets
Last Updated5/19/2026
Location
Abilene, TX, US
Sold By
Warren Power Systems
Featured Item
Caterpillar XQ-60 48KW Generator

2017 Caterpillar XQ-60 48KW Generator

$31,000 USD
110% SPILL CONTAINMENT, 3 WAY FUEL VALVE, 60 HZ, AUTO START, BATTERY CHARGER, BATTERY DISCONNECT SWITCH, CAT BRAND GENSET, COOLANT HEATER, DIESEL, DUAL WALL FUEL TANK, EARTH LEAKAGE...
ConditionUsed
Usage6,800 Hours
Stock NumberEU00101
MLS Number12098435
CategoryGenerator Sets
Last Updated5/18/2026
Location
Knoxville, TN, US
Sold By
Stowers Power Systems
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 Updated5/18/2026
Location
West Columbia, SC, US
Sold By
Blanchard 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 Updated5/18/2026
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 Updated5/18/2026
Location
Miami, FL, US
Sold By
Pantropic Power
Cummins DFCE Diesel Generator

2005 Cummins DFCE Diesel Generator

Recently Updated
$39,900 USD
Cummins 400 kW standby diesel generator set model DFCE, SN-C050755869. Cummins NTA-855-G5 engine rated 605 HP at 1800 RPM, SN-30371943. 3/60/277/480V. 600A main-line circuit breaker. PMG...
ConditionUsed
Usage508 Hours
Horse Power605 HP
Engine ModelCummins NTA855-G5
Stock NumberCentral States #5050
MLS Number14362978
CategoryGenerator Sets
Last Updated5/20/2026
Location
Waukesha, WI, US
Sold By
Central States Diesel Generators
Cummins 125 Kw Diesel Generator

Cummins 125 Kw Diesel Generator

Recently Updated
$16,000 USD
This Cummins 125 kW diesel generator is a dependable, high-performance unit designed for prime or standby power applications. Built with Cummins’ proven engineering, this generator delivers...
ConditionUsed
Usage542 Hours
Horse Power207 HP
Engine ModelCummins 6CT8.3
MLS Number14310936
CategoryGenerator Sets
Last Updated5/20/2026
Location
Decatur, TX, US
Sold By
Industrial Diesel, Inc.
Caterpillar XQ125 T4F Generator

2021 Caterpillar XQ125 T4F Generator

Recently Updated
$45,750 USD
110% Spill Containment, Battery Charger, Battery Disconnect Switch, Camlocks, Cat Brand Genset, Customer Value Agreement (CVA) 2-year/2,000-hour Customer Value Agreement (CVA), Engine Type -...
ConditionUsed
Usage4,030 Hours
Stock NumberRP15238
MLS Number14240433
CategoryGenerator Sets
Last Updated5/20/2026
Location
Tulsa, OK, US
Sold By
Warren Power Systems
Caterpillar XQ 425 Generator

2023 Caterpillar XQ 425 Generator

Recently Updated
$255,500 USD
Auto Start, Battery Disconnect Switch, Cat Brand Genset, Engine Governor, Engine Type - Diesel, Frequency - 60 Hz, Generator, Hitch, Trailer, Jacket Water Heater, Permanent Magnet Generator...
ConditionUsed
Usage240 Hours
MLS Number14229041
CategoryGenerator Sets
Last Updated5/20/2026
Location
Jacksonville, FL, US
Sold By
Ring Power Corporation
Caterpillar XQ 425 Generator

2023 Caterpillar XQ 425 Generator

Recently Updated
$255,500 USD
Auto Start, Battery Disconnect Switch, Cat Brand Genset, Engine Type - Diesel, Frequency - 60 Hz, Generator, Hitch, Trailer, Jacket Water Heater, Permanent Magnet Generator (PMG), Rating -...
ConditionUsed
Usage316 Hours
MLS Number14228958
CategoryGenerator Sets
Last Updated5/20/2026
Location
Jacksonville, FL, US
Sold By
Ring Power Corporation

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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