Here's some helpful tips from your BBB on Used Cars:
If you are considering purchasing a used car from an independent used car lot or franchised dealer, BBB suggests that you make sure that the car has a Federal Trade Commission "Buyer's Guide". The FTC requires the business to equip cars with window stickers telling consumers who will pay for repairs after a sale. This "Buyer's Guide" should be part of any sales contract and must include the following: 1. The terms of any warranty, including its duration, systems covered, and the percentage of repair costs the dealer will pay; 2. A prominent statement saying that if the business is selling the car "as is", the consumer must pay for any repairs needed after the purchase; 3. A suggestion that the consumer have the car inspected by the mechanic before buying the car; 4. Information about the availability of service contracts; and 5. A suggestion that consumers ask the company to put all promises in writing. This rule covers all passenger cars, light duty trucks and vans.