- Baseball Planet Sportscards
 - Live online sportscard and memorabilia auctions. - Sports Auction
- Interactive auctions featuring sport memorabilia, collectibles and sportscards.
- MastroNet
- Online consignment auction house specialising in high quality individual items and collections.
- Amy's Auctions
- Online auctions run regularly for football, baseball, basketball, hockey, and nonsport cards.
- etopps
- Line of baseball, football, basketball, and hockey cards available exclusively online and sold individually for a limited period of time.
- Leland's
- Auction house specialising in sport and pop culture memorabilia.
- Rotman Collectibles
- Auction site with over 1,200 sport related items for auction.
- Collectors Network Trading Center
- Trading community for sport collectibles.
- Greg Manning Sports
- Cardboard Connection
- Full featured social network and online auction marketplace for collectors of trading cards, sport cards, autographs, and memorabilia.
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