The School Textbook Hunt

It's going to be, drumroll please, Amazon.com this semester. I'm taking a math course and the book costs $120 new and $90-something used. Usually I can find a textbook to buy on eBay. Actually, all my courses so far at Boston University have used novels and a fiction book only. Most of them I was able to find used -- you have to cut costs wherever you can. I can't find this textbook on eBay, sadly. But Amazon does have it. What a relief; it costs on $35. I can't avoid the $60 textbook though.