Kelly Blue Book is a great site with a ton of information on all cars, including pricing and features. It provides trade-in values and also retail values in many conditions.
Articles Posted in Site Of The Week
National Consumer Law Center (Site of the Week)
I have been a member of the National Association of Consumer Advocates for almost ten years. I have learned much from this organization. They provide expert witness services and they have an entire set of books dedicated to consumer law. They have provided assistance to major litigation projects throughout the entire country.
National Automobile Dealers Association
This site provides significant insight into what is going on in the automotive industry. There are statistics that explain where the dealers are making money: new cars, used cars and service department. It counts the dealers in each state and explains. The NADA data section is worth a quick look.