Hi Bill; I only know what information is published in the guide books as a reference. It is a very tough chip and have received several inquiries about it when I had my Colorado Blackhawk chips listed on ebay a couple of weeks back... to which I replied, "the Mayor Willie's chip will be offered when I put up the Central City chips on ebay." Now is that chance to bid. I think my opening bid is a fair one. I saw another Mayor Willlie's chip being offered on ebay via BUY IT NOW at twice the price, but I think the seller has since taken it down. Sometimes I think that the same chips are being offered over and over again after they do not sell, giving the false impression that there are a lot of them out there... not just on the Mayor Willie's chip, but others as well.