Credit Acceptance Corporation 
Provides funding, receivables management, collection, sales training and related services to automobile dealers. (Nasdaq: CACC).
http://www.credaccept.com/First Investors Financial Services Group 
Purchases and retains receivables originated by franchised automobile dealers from the sale of new and late-model used vehicles to consumers with substandard credit profiles. (Nasdaq: FIFS).
http://www.fifsg.com/
Interstate National Dealer Services, Inc. 
Designs, markets and administers service contracts and warranties for new and used motor vehicles and recreational vehicles. (Nasdaq: ISTN).
http://www.inds.com/
Manheim Automotive Financial Services 
Floor planning and financing for used car dealers and rental car companies.
http://www.UseMAFS.com