This script allows students to create an account and list their books from previous semesters for sale. Other students can search through the listings by title, ISBN number or author and purchase the books they need. Yes there are other sites like Amazon and Ebay that offer similar services, but the advantage we have is that you can choose to meet the seller on campus to exchange the book (you can still have the book shipped to you). Both students benefit because you cut out the middleman.