Chad, I don't think you really read my last post. I never suggested he not get the books or that textbooks are a racket because they aren't usefull. Jesus, surely you saw up above when I told him that he shouldn't even consider waiting to get his math book.
I merely said he shouldn't pay what the bookstore is charging for them. He should buy online. He should ask his professor if an earlier version will do, since publishers of textbooks regularly release revised editions that aren't changed from the previous edition in any important or substantial way, yet the new edition costs 600% more than the previous edition. I've had lots of professors say that a previous edition will be perfectly fine. If it's not fine, asking certainly didn't do any harm.
And the textbook industry is a racket. As I said, publishers regularly release superfluous new editions. But they also give gifts and other incentives to professors to stop using old editions immediately every time a new edition comes out regardless of how useless the changes are. It works very much like the pharmeceutical industry, where doctors will deliberately prescribe a name brands (and mark "no generic" on the script) when they know a generic exists, because of the perks they get from the drug companies.
By the way, $85-90 a pop is nothing anymore. My highest so far was $159 for one book. A $450 semester for books is not uncommon and I've known people get up near $700 for one semester.