Also, go to Jeff's $avoMeter and check what you paid for the car with what gets reported. That gives you a good idea what folks are getting out there who are very frugal with money and attempt to use his website.
EG, I bought a 2007 Base model 4x2 Rav4. There are about 5 of those listed on the site, so I know how well I did.
(I did pretty well).
And his full series of car buying tips starts here.http://www.carbuyingtips.com/car1.htm