Got a Book  
   For students to buy and sell books.
   http://www.gotabook.com/index1.htm

Online For Books  
   Book promotion service for authors and searchable database of books, with purchase direct from author.
   http://onlineforbooks.com

Student Listings  
   Buy and sell book service for college students.
   http://www.studentlistings.com/

Text Book Trader  
   Buy, sell, or trade used textbooks. Based in Canada.
   http://www.textbooktrader.ca

1800Student  
   Textbook exchange for students worldwide, plus used children books and musical items.
   http://www.1800student.com/

E-collegebooks.com  
   Bulletin board for students to sell and/or buy books.
   http://www.e-collegebooks.com/

XLCampus.Com  
   Buy and sell used textbooks directly from students.
   http://www.xlcampus.com/

Swap Books  
   Service for students to buy, sell and swap used books.
   http://www.swapbooks.com/

Zoo Ad  
   Students buying and selling service for text-books.
   http://www.zooad.com/

Text For Sale  
   Students buy and sell books; also searches bookstores.
   http://www.textforsale.com/

One and Ten  
   Secondhand text books classifieds site for university and college students.
   http://www.oneandten.com

TextBargains.Com  
   Buy and sell college textbooks.
   http://www.textbargains.com

AgencyOne  
   Provides an online service for users to buy and sell used books. Based in Singapore.
   http://www.a1.com.sg

More For Nothing  
   Offering free ride sharing and used textbook exchanging services. Based in Canada.
   http://www.morefornothing.com

StormBooks.com  
   Site for St. John's University students to buy and sell textbooks.
   http://www.stormbooks.com

Mercantiquo  
   Matches buyers and sellers with old and rare books.
   http://www.mercantiquo.it/