Half.com and/or from other students. NEVER EVER from the bookstore. I also use Borders + 30% / 40% off coupons I get e-mailed through being a "preferred member" or whatever with them. They may balk at "special orders" which are most of the books, but most managers want the sale. Sometimes Amazon 3rd party is cheaper, other times new through Borders + coupon is cheaper. I also get GC's from family for the holidays, which covers most of my books.