ArtNet - Books, prints, auctions, auction listings, artist profiles, galleries, gallery listings, museum listings and more.
Dorotheum Auction House - Vienna auction house specializing in unique artworks.
Fine Art Site - Buy and sell art, auctions, search by artist and more.
iCollector - Online art collectors guide with auctions, auction listings, price guides, appraisers, exhibitions and more. (****)
Bid 4 Vacations - Bid on cruises, spas, hotels and more.
Gemtraders - Gems, stones, jewelry and more.
Unific - Sports and art memorabilia owned by or created by famous people.
Baseball Planet - Find sportscards as well as place them up for bid.
Fan2Fan - Dedicated to sports fans and collectors of sports memorabilia.
Sportsworld - Sports auctions, memorabilia, cards and photos. (not yet rated)
- Online auction site for sports and fitness equipment. (not yet rated)