Yeah dude, what's $50 when compared to ~$100,000 you'll spend on law school? The books you never need to buy are the Kaplan, Barron and PR books, since they are always available at the bibliotheque. I bought Master the LSAT, all three 10 Actual LSAT books, and the Powerscore LG Bible. In the future, I am planning to buy the Powerscore LR Bible. I believe those are all the books you'll need for the LSAT. Some ppl say Professor Dave's LSAT Advantage book is good, you might want to get that as well.