While I sit here rotting--er, working happily--in the Cheapskate Labs basement, the lovely Mrs. Cheapskate is busily pursuing a degree in nutrition. That means lots of chemistry classes, which, in turn, means lots of insanely expensive textbooks. And I mean insanely expensive: for some classes, the books cost nearly as much as the credit hours!
Fortunately, we've discovered Chegg, which allows us to "rent" textbooks for significantly less than buying them new--and, in many cases, for less than buying them used.
For example, when Mrs. C needed Macroscale and Microscale Organic Experiments, 5th Edition, for an organic-chemistry class, the best price I could find anywhere (including the school bookstore) was about $125. Chegg's price: $79.57, including two-way shipping (the book arrives with a prepaid return label).
I particularly like this outfit because they work with various environment partners to plant a tree for every textbook you rent, buy, or sell (Chegg pays good cash money for any used, unwanted books you may have). So you not only save money, you also get that warm, fuzzy helping-the-planet feeling.
If you're taking classes at the college level, I highly recommend checking out Chegg for your textbook needs.