In this case, she is not uninformed - she fully knows what she is doing by now. But overall, I agree. Ebay doesn't step in because any one of us could just be a competitor trying to hurt another seller.

If your club wants to take a stand against individual sellers, you need to create a connection with Ebay's fraud unit in advance and establish your credentials like law enforcement does. Individual members popping up and complaining to Ebay has never worked except when the seller honestly tries to rectify the situation. That type of input resulted in Ebay only accepting graded coins certified by certain companies.