As of tonight, as this reply is being posted. Mr. Howes Ebay listings have "Hugh Laurie", "House M.D." and "Dr. Gregory House" listed in his auctions. Most people who do likeness sculpts use another name and make no reference to the show, actor or character.
If reported and the listings are removed, even if Mr. Howes comes back, he will be forced to list the House MD sculpts under generic names and monikers, which will make it more difficult to find via Ebay general search, which will reduce his listing page views/traffic, which will likely reduce his bids and number of sales.
If enough people report the auctions, and keep reporting them, one of two thing will happen.
A) Howes will stop listing on Ebay
or
B) Howes will have to adjust his listings that will reduce his marketability and potential sale of said items