If you still don't know, Kelley Blue Book is THE company to go to when looking for vehicle valuations and pricing. New or used cars, it doesn't matter, KBB will provide whatever you're looking for in a car's aspect.
The Kelley Blue Book website itself provides other helpful service tools like the used car history checker, which is so powerful it could trace how many owners a specific car had and a car comparing tool, which of course, would make you compare cars maximum of four at a time.
(Residual values used for award calculations are based on the November/December 2012 Kelley Blue Book® Residual Value Guide. Top 10 models appear in alphabetical order).