AbeBooks - http://www.abebooks.com/
Your source for used, new, rare and out of print books. Find classic collectibles, rare signed editions, used textbooks, and inexpensive bestsellers from independent booksellers worldwide.
Renting Textbooks - http://www.textbooksrus.com/
We offer new and used textbooks, fiction and nonfiction novels, high school books, and a lot more. Not only can you buy books with us, but we also offer the ability to sell your used books back to us. Sell used books and buy used books with Text Books R Us!
SchoolKidz - http://www.schoolkidz.com/
Finding school supplies for your children used to be a task that was time-consuming and very frustrating.