These are obviously Harbour Lights dealers hiding behind the anonymity of eBay, concealing their true names and locations because what they are doing is a violation of their dealer agreement.

Taking off their masks involves determining which number pieces they are selling. They know that so they don't include that in their posts and they won't respond outrightly if you email them to ask.

If you buy from one of them, they are taking business away from dealers who stay honest to their agreement.