Possible Clues:

• Company founded as AuctionWeb
• Web site that includes the heading 'Dolls & Bears'
• Web auctioneeer
• Site for a cyberauction
• Its four-color logo no longer has overlapping letters
• Huge auction site
• "Electronics, Cars, Fashion, Collectibles, Coupons and More" website
• Owner of Bill Me Later
• Company whose Nasdaq symbol is the company's name
• Where bidders wait online