i am about to buy aamc's practice mcats. 80 bucks is a lot of money and i do not want to spend that kind of money on a bunch of tests i may have taken already. i have taken all the princeton review and kaplan practice test that i have been able to get my hands on. on the aamc website it does say that they have sold past tests to "commercial review" companies. if someone that has purchased these test from aamc and found them to be the same as kaplans, princeton, etc., please respond to keep me from unnecessarily spending 80 bucks.