Appraise a Used Car

The most accurate price for your current car/vehicle from edmunds.com. This allows you as a consumer to decide whether to trade-in or sell your car when you're ready to buy a new one or if you had an accident with your Used car.
edmunds.com/appraisal

Also, if you decided to sell your used car:

Selling your car today is a different experience than it was 10 or 15 years ago, thanks to the tools available on the Internet. Online appraisal tools and Internet classified ads have made the process faster and more convenient.
Edmunds.com has an in-depth 10-step guide to selling your car, but this article condenses the selling process into five simple steps that can help you turn your used car into cash in the shortest time possible. You can also print out this article and use it as a checklist to keep you on track.