Auction Explorer
Antique book auction in Southern Africa
http://www.auctionexplorer.biz/

Books By Bid
Online interactive auction and store; books and other paper products.
http://www.booksbybid.com/cgi-bin/start.cgi/htmlos/Main.html

Children's Book Auction
Online auction specializing in children's books.
http://www.childrensbookmarket.com/auction/auction.asp

eBay Listings : Books
Home page for book auctions, including antiquarian, children's, fiction and bulk auctions.
http://books.listings.ebay.com/_W0QQfclZ3QQsacatZ267QQsocmdZListingItemList

PBA Galleries
Rare book auction house, featuring live auctions.
http://www.pbagalleries.com/