Is there a catch or reason why expensive items are so cheap on ebay?

[Christina]

If the item sounds too good to be true, it is most likely fake or stolen. Ebay does work to remove auctions that violate their policies, but these sellers do manage to creep through the would works a good amount of the time. They usually still have fairly good feedback, because a lot of the time, people don't realize the merchandise they've purchased is fake till it's too late to file a complaint about it.