A.G.
Try an online sell back site. Do a search for "text book buy back". You type in the ISBN and it will tell you if they will buy the book. If they will buy the book they will tell you for how much and they will pay for the shipping. All you have to do is pack it in the box and stick on the label. I have done this a few times and made back quite a bit of money on some old books that I found in my closet.