Time to sell those Textbooks!

What the heck do you do with textbooks that you're done with? My friend said to check online to see if there was a place I could sell them. I really never thought I would be able to sell textbooks. The great thing is there are several websites online that you can sell textbooks to. I mean really it is going to work out perfectly for me. They get the textbooks that are taking up my space and I get extra money use on Christmas presents!