Edmunds.com Market value prices for new and used vehicles, reviews by make and model, road test reports, dealer prices, loan and lease quotes, etc.
Fuel Economy guide from the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy and the U.S. Environmental Protection Agency. The site helps fulfill DOE and EPA’s responsibility under the Energy Policy Act (EPAct) of 1992 to provide accurate MPG information to consumers.
Kelley Blue Book List price of new and used cars and motorcycles, and specs and photos for new cars.
NADA Guides Online version of appraisal guides from the National Automobile Dealers Association.