Ditto TX5's reply above...and here's more websites (all nice a quickly accessed right at our fingertips

) set-up to give an approx fair market price when trying to determine the value of a vehicle that's being considered for sale or trade-in (private sale or car lot trade-in):
- New Cars, Used Cars, Car Reviews | Cars.com
- New Cars, Used Cars - Find Cars at AutoTrader.com
- N.A.D.A. Home Page
TIP: I usually use 3 or more sites then take the average of all their results especially if there's a big enough difference between what they come up with for the market in which the vehicle is being sold or traded.