ABA International : Antiquarian Booksellers Association
Advanced Book Exchange
Addall.com
amazon.com "earth's biggest bookstore"
Biblio.com
BookFinder.com
(this will search ABE, Alibris, Amazon, Bibliofind, Powell's, and others, all at once)
viaLibri searches more than 15,000 antiquarian booksellers
worldwide
E-Bay an online auction site
Galaxidion Le marché du livre ancien ou
épuisé
IOBABooks.com (the Independent
Online Booksellers Association)
J. Michaels Books
in Eugene, via ABE
Philadelphia Rare Books & Manuscripts Company