I agree with BT. Gougers would just Photoshop that out, and the victim has no recourse on eBay. The seller listed it below what it currently retails, so it's on the bidder if you bid a stupid ass amount without doing research.
As a seller, it's not my responsibility to inform you on what the current retail price of an item is, especially if I'm listing it at half that. If the buyer left negative feedback, you could have it reversed.
If the seller listed it as a BIN for $200, you would have more of a case, but still it's on the stupidity of the buyer.