These web sites allow you to search the combined inventory of many used book dealers.
Bookfinder This resource searches the holdings of new and out-of-print book databases and presents a combined result. Databases searched include Advanced Book Exchange, Powell's Books, and others.
AddALL This multi vendor search engine is particularly useful for non-North American imprints.
Advanced Book Exchange This site claims it is the world's largest source of out-of-print books with over 13 million titles.
Alibris This reseller taps into the holdings of over a thousand small out-of-print dealers and re-sells their titles directly and via services such as Amazon.com.
Antiquarian Booksellers' Association of America The ABAA Booknet specializes in rare and antiquarian books, maps and prints.
Bibliofind Now part of Amazon.com, this service allows o.p. dealers to list their holdings on the Web. Current size is listed as over 9 million titles.
Powell's Technical Books This megabookstore, based in Portland, Oregon, has a immense collection of technical books.
BookSearch This service searches the Internet and other resources for out of print materials.
Direct Textbook This website focuses on textbooks and provides price quotes from multiple textbook retailers.
Zubal Books Based in Ohio, this company buys and sells used scholarly books.
Additional websites and catalogs of individual bookstores and used book dealers can be found at Yahoo's Antique, Rare and Used Book page and AcqWeb's Rare and Antiquarian Book Venders list.
