If you're paying $1000+ in texts per semester you are do it wrong. I made it through my last 2 years paying $500 (nope not $500/semester, $500 total over 2 years) doing a math degree. It would have been less but I prefer not to sell most of my texts back.
Buy your texts as ebooks saves you roughly 50%
Borrow them from the library save 100% (pay some late fees and keep it the full semester save 90%)
Buy the "international edition" (questionable legality?....oh well like you said "fuck McGraw Hill") I paid as little as $17 for a softcover international shipped when the book store wanted $150 (hardcover edition). The pages were thiner, and there was some chinese characters on the front but it was otherwise identical on the inside.
Buy/borrow from a friend
Buy used from Amazon, you can sometimes even make money doing this. I bought a physics text and then sold it back to the book store for more than I paid.
The book store is only for if you really want to take the plastic off or you put off buying book until classes started (even still there rush shipping on almost any site).