I wish I would have kept track of all of the money I've spent on textbooks the last 6 years on textbooks. Just recently, I've started doing the textbook rental deal, and it has helped alot. Especially since law books seem to have a new edition come out every year, so you can't often resell them afterwards (such a waste!)
I was contacted by Campusbookrentals.com recently to share their website with you college go-ers!
Some perks for renting textbooks through them are: save 40-90% off of bookstore prices, free shipping both ways, can highlight in the textbooks (a big perk for law students), and flexible renting periods.