Amazon Books, "Earth's Biggest Bookstore. 1.5 million books in print and 1 million out-of-print books."
Barnes & Noble "World's Largest Bookseller Online. Over 400,000 in-stock titles. Book Search over 1 million titles."
fatbrain.com "an online bookstore solely focused on technical and computing-related titles. We stock nearly 30,000 titles in our warehouse and list over 300,000." (Information on many out-of-print titles shown.)
DealTime "checks out prices, availability, plain shipping time and shipping costs of your book at over 20 online stores - simultaneously! Find the best offer within a few seconds!"
ABE: Advanced Book Exchange, "The INTERNET's most popular service for buying and selling out-of-print, used, rare and antiquarian books." ABE reports in February, 1999: "Currently, we have over ten million books in our database. If we don't have the book you are looking for, you can create an account for yourself (free) and leave up to 500 wants on the system. The system will then match your wants with the new books being entered into the system and notify you by email if the book you are looking for is found. In addition, our bookseller network has grown to over 4400 members from 30 countries around the world."
"Bookavenue.com, a cyber-avenue where booksellers and readers meet to buy and sell the best book, at the best price. Why pay extra, buy direct! No superstore mark-up, just folks buying and selling on bookavenue."
TomFolio.Com, a website for buying and selling used, rare and collectible books, ephemera, and periodicals, jointly owned by independent member booksellers.
JustBooks UK, the largest Internet marketplace in Europe for second-hand and antiquarian books. Here you will find more than 1,100,000 titles offered by over 250 book dealers around the country and beyond, from paperbacks to rare, out of print or first editions.
We bring together book buyers and booksellers — dealers, publishers and private presses — and provide interesting links with other book-related sites. With bibliophile.net, there are no price markups — you buy directly from the bookseller.
"Welcome to the world of out-of-print, used, and rare books. Find and BUY the BOOKS you've been looking for right here. Alibris GUARANTEES every book we ship."
"21 North Main, "the virtual marketplace for used books; the first choice for anyone seeking to buy used, out-of-print, antiquarian or rare books."
Gutenberg Holdings, Internet sellers of used, out-of-print and rare books; over 100,000 books in stock, in many subjects and languages.