Used Car Prices
The best place to find Used Car Prices depends on which country you live in.
In the United States of America the Kelley Blue Book is the authoratitive guide for used Car Prices.
In the United Kingdom (UK), the Parker's Guide and Auto Trader both offer prices for used cars based on make, model, condition and availability of the cars.
In Austrailia the redbook is often the first choice for finding out how much your used car is worth.
If you want to do a google search then dont just type "Used car prices". Add the name of your country and add the brand of car you are interested in to make searching easier.