alibris.com

I just learned about this site from another teacher and it is GREAT!! she showed me the books she purchased from them, and they are all in almost new condition. No more wear and tear than they get the first time anybody reads a book. I just ordered 5 books ( 2 of which are textbooks) for $33 with shipping!!!

www.alibris.com check it out!

that's a great site!
once you order from there, they'll send you discount codes for future purchases.