Consumer Information Cars:

Consumer Reports 
Expert, unbiased product ratings and reviews. 

NADA
Research new and used car values.

Kelley Blue Book
Check new and used car values. Find reviews and ratings.

Additional Consumer Resources:

Better Business Bureau
Helps create a fair and standardize market place for buyers and sellers. This resource also has information on various charities.

Federal Trade Commission Consumer Advice 
FTCCA provides consumers with a variety of information which includes credit, loans, debit, scams, identity theft, and shopping advice.