Barrett-Jackson Auction Company
Specializing in a range of on and off-line sales of classic and collectible cars.
http://www.barrett-jackson.com/

Branson Collector Cars Auction
Twice yearly auction of classic cars held in Branson, Missouri.
http://collectorcars-int.com/

Collectors Car Auction
Free online auction offering anything and everything related to cars, including spares, books and models.
http://www.collectorscarauction.com

Copart, Inc.
Provides a full range of auction services to buy and sell salvaged vehicles.
http://www.copart.com/

Ebaymotors
Offers new and used cars, motorcycles, parts and accessories.
http://www.motors.ebay.com/

Greatplateexchange.com
Buy or sell USA registered vanity license plates.
http://www.greatplateexchange.com/

Leake Auto Auction
Sales of antique, classic and collectors cars.
http://www.leakecarauction.com/

Motors Auction Group
Public auction for motor vehicles including cars, boats and motorcycles.
http://www.4mag.com

Racer's Auction
Buy and sell new and used racing parts in a live auction.
http://www.racersauction.com/auction/

SalvageNow
Auctions for damaged and salvaged vehicles from insurance companies, rental agencies, and independent salvage dealers. Membership of the site is restricted to professionals within the industry.
http://www.salvagenow.com

U.S. Government Vehicle Sales
Government vehicle auction information including sales schedule, geographical and model search.
http://www.autoauctions.gsa.gov/