Ebay is still #1 in the market (especially in the US). Definitely the most amount of items/sellers and buyers. Oversears is a different story though.
Now days , Swoopo and groupon having different model of business and different style of auction but they are making a lots money...
i m looking for a auction site for laptops,apple products and other electronics goods...........any one here knows where i can easily win auctions of these things