Generator Sets For Sale

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

Explore 1,967 new and used Generator Sets on MyLittleSalesman.com, with prices from $200 to $12,345,678. Filter by hours, price, or year to find job-ready Generator Sets near you with the specs you need.
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 1,967 Generator Listings

1 - 25 of 1,967 listings
1 - 25 of 1,967 listings
Featured Item
Caterpillar 3406 Generator

1981 Caterpillar 3406 Generator

$24,500 USD
Auto Start, Battery Charger, Battery Set, Cat Brand Genset, Circuit Breaker, Control Panel - Other, Engine Type - Diesel, Frequency - 60 Hz, Generator, Jacket Water Heater, No Enclosure,...
ConditionUsed
Usage447 Hours
Stock NumberEU00183
MLS Number14099064
CategoryGenerator Sets
Last Updated4/15/2026
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 Updated4/15/2026
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 Updated4/15/2026
Location
Eugene, OR, US
Sold By
Peterson Power Systems
Featured Item
Caterpillar XQ0350 Generator

2014 Caterpillar XQ0350 Generator

$155,000 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
Usage5,491 Hours
Stock NumberUE01157
MLS Number11077982
CategoryGenerator Sets
Last Updated4/15/2026
Location
Eugene, OR, US
Sold By
Peterson Power Systems
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 Updated4/15/2026
Location
Miami, FL, US
Sold By
Pantropic Power
Whisper Watt 25KVA Generator S/N 3652682 (Running

Whisper Watt 25KVA Generator S/N 3652682 (Running

Newly Listed
At auction Apr. 22
Whisper Watt 25KVA Generator S/N 3652682 (Running, Operates) NOTE: This unit is being sold AS IS/WHERE IS via Timed Auction and is located in Sparks, NV. Inspection preview days for this...
ConditionUsed
Stock NumberR2828
MLS Number14311445
CategoryGenerator Sets
Last Updated4/15/2026
Location
Sparks, NV, US
Listed By
JJ Kane Auctions
Onan Pro6000E Generator (Condition Unknown)

Onan Pro6000E Generator (Condition Unknown)

Newly Listed
At auction Apr. 22
Onan Pro6000E Generator (Condition Unknown) NOTE: This unit is being sold AS IS/WHERE IS via Timed Auction and is located in Las Vegas, NV. Inspection preview days for this unit are the 2...
ConditionUsed
Stock NumberLV403
MLS Number14311389
CategoryGenerator Sets
Last Updated4/15/2026
Location
Las Vegas, NV, US
Listed By
JJ Kane Auctions
Cummins 125 Kw Diesel Generator

Cummins 125 Kw Diesel Generator

Newly Listed
Contact for price
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
Engine ModelCummins 6ct8.3
MLS Number14310936
CategoryGenerator Sets
Last Updated4/15/2026
Location
Decatur, TX, US
Sold By
Industrial Diesel, Inc.

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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