I sold two on ebay. I had three bidders at the time, but only the winning bidder and one other losing bidder bought the plaques. The third (losing) bidder did not wish to purchase a plaque. Yes, these plaques contain unique serial numbers. By the "highly unlikely" term, I meant you would have a hard time finding someone else who had a plaque, or a casino chip for that matter, from the Baghdad Palms Casino. I have done some research and know of no one else who has one. Sorry for the confusion.