Textbook Exchange Canada - Buy and sell used textbooks in Canada. Follett Educational Services - Used textbooks for grades K-12. Class Book - Used, and some new college textbooks. Buyback service based at East Greenbush, New York. The Book Cellar - Specializing in college-level technical books. Free Book Express - Textbooks and novels, with a 12 site price comparison feature. Bookbyte - Sells college and school textbooks. StuBex - Book exchange for US and Canadian college students. Registration required. PDX Books - Buy and sell college textbooks as well as compare prices at online bookstores. Collegebooksdirect.com - Buy and sell new and used college textbooks. Includes online search. Textbook Ace - Offers K-12 and college texts. Online search with detailed condition descriptions. Academic Book Services, Inc. - Grades K-12 reconditioned used textbooks, reference materials, workbooks and paperback titles.