I belief this would catch trend once we have someone / student to get the ball rolling. Someone need to start, eventhough you may not sell the book, there is chance that in the long run, you will be able to sell more of other books using Syiok dotCom.
Selling Text Book is still new and should be encourage. If you have finished the semester and the text book, sometimes is your elective subject, therefore not being useful keeping them on your shelf. It is ideal for your to sell them and use it to buy your new book for the next semester.