Buy the textbooks you need. Sell the textbooks you don't need. A group of students helping each other by buying and selling their textbooks to each other instead of the College Bookstores. Have you ever bought a college textbook new for $200, sold it back to the bookstore for $30, and watch them resell it for $140 used? Bring down the cost of going to college by buying and selling your textbooks directly to each other!