Possible Clues:

• Website with a Collectibles & Art section
• Auction site with Daily Deals
• Cyberbidder's mecca
• Site with the option 'Shop by category'
• Weird Al song that wonders, "Tell me why I bid on Shatner's old toupee"
• 'The meaning of life' once sold on it for $3.26
• ''World's Online Marketplace''
• Former owner of PayPal
• Popular bidding site
• Place to do your bidding