The following book search sites will give you an idea of what retail booksellers are charging for used books. These are asking prices; you may not sell your book for the same amount. Bookseller reputation and geographical location play a part in setting the final price. Therefore, the real value of a book is what someone will actually pay you for it.

In using the online search engines to price books, pay close attention to the description and grading, and adjust the value of your book when it is in either better or worse condition than those listed. You might also temper the price and scarcity information on these databases with your own experience and knowledge.

	Addall New Book Search Searches a number of stores dealing in new books.
	Addall Used Book Search Searches a number of search engines for used and out of print books.
	ABE - Advanced Book Exchange Searches inventories of multiple booksellers.
	Alibris Searches inventories of multiple booksellers.
	Biblio.com Search for new and used books.
	Bibliofind Searches inventories of multiple booksellers.
	Bibliopoly International rare and antiquarian book search.
	Bookfinder Searches a number of book search engines.
	BookSeek An index to the on-line catalog pages of numerous book sites which are not listed at ABE or BiblioFind, and are otherwise unsearchable.Searches multiple sites for used or new books.
	Booksold Searches a number of book search engines and used-and-rare book sites.
	eBay Search the eBay auction site for books and book prices.
	International League of Antiquarian Booksellers International book search.