2) What is the trade-in value of my old car?
(Word to the wise: No trade-in is "Excellent" by Kelley Blue Book Standards. Use "Good" for a near perfect car and "Fair" for a decent, but not perfect car.
Go to: http://www.kbb.com/kbb/UsedCars/default.aspx

3) How much could I sell my old car for as a private party?
Go to: http://www.kbb.com/kbb/UsedCars/default.aspx

4) Government Crash Test Ratings
Go to: http://www.safercar.gov/

5) Vehicle Rollover Ratings
Go to: http://www.nhtsa.dot.gov/cars/testing/ncap/Rollover/Index.htm

6) Child Seat Safety Information
Go to: http://www.nhtsa.gov/CPS/CSSRating/Index.cfm

7) Gas Mileage Comparisons From the EPA
Go to: http://www.fueleconomy.gov

8) Get a Carfax vehicle history report here! We recommend you NEVER buy a used vehicle without knowing its history. We trust Carfax Reports."
Go to: http://www.carfax.com