US government agencies are continually replacing and disposing of their vehicles. Most vehicles sold at Government auctions are no more than 3 years old and almost always come with documented maintenance history and have low mileage. Holding onto surplus vehicles that are no longer required by the US Government is expensive so they send them to auction to achieve a quick sale and to limit holding costs.
If a vehicle was purchased under a Federal or State government contract then it is eligible to be sold at a government auction. Government sources of vehicles include:
Federal Government & IRS
State Government
Local Council organizations
Fire & Emergency Services
Hospitals & ambulance services
US Customs
US Postal Services
Department of Defense
General Services Auctions (GSA)
Department of Housing and Urban Development
Universities & other education institutions