This is getting way more common on eBay and COMC. About a moth ago a seller had a card listed at $40. It is kind rare so I offered the $30 they sell for when you can find one. Never got a response but the seller raised the price to $50.
Got lucky and had the opposite happen on a very nice LS Wade Boggs promo bat recently. Seller had it listed as a game issued model for $250. I recently got the Malta book and messaged the seller(consignment seller) and explained what the bat really was and picked it up for $100.
