Booksellers
- ABAA booknet
- —Web site for the Antiquarian Booksellers Association of America.
- AcqWeb
- —Directory of Rare and Antiquarian Book Vendors.
- AddALL
- —Used and Out of Print Search
- Abebooks: New Books, Used Books, Rare Books, Out-of-Print Books
- —Internet service for buying and selling out-of-print, used, rare and antiquarian books.
- Alibris
- —A source for used, rare, and hard to find books.
- Antiqbook
- —Antiquarian Booksellers Online.
- Antiquarian Book Dealers and Associations on the World Wide Web
- —A database holding the stock of a selected number of dealers, mainly members of ILAB. Search for, buy and sell antiquarian books.
- Antiquarian Books on the Internet
- —An international listing of antiquarian booksellers.
- Bibliofind
- —"The Internet's largest inventory of old, used and rare books for sale" with an inventory of over 1.65 million volumes offered by about 700 booksellers.
- Bibliophile Home Page (aka Bookshelf)
- Booklyn
—An artist and bookmakers organization headquartered in Greenpoint, Brooklyn. - Books & Book Collecting
- —Dedicated to providing a convenient interface to the many resources available on the Internet focusing on books for collectors.
- Books by Bid
- Bookstore MetaSearch
- —Lets you search the 6 bookstores/directories for the same title at once.
- DealPilot
- —Compare book offers on the Internet! DealPilot checks out prices, availability of your book at over 20 online stores!
- Digital Bibliophile Community
- —A Place for Booksellers, Collectors and Readers.
- Netherlands Antiquarian Booksellers' Network
- Philadelphia Rare Books & Manuscripts Company
- —PRB&M has a searchable site as well as several subject pages visitors can browse.
- UKBookWorld.com
- —The British marketplace for scholarly and collected old, rare and out-of-print books.