Where were the other two Don?? I only remember seeing the recent question about this chip and my scan. I was able to acquire six of these a few months ago. I've posted them on ebay with no interest and can't imagine why. I've NEVER before seen them for sale until I found the ones I did......not in any auctions, chip lists, nada! Maybe there were 4 - 7 known in collections but not for sale. Even the Chip Rack doesn't list this chip in NON-CANCELLED condition so it apparently was/is quite scarce! Take the 7 known, add the one posted on the BB that another collector is keeping, the 2 others I now know of that are for sale (at a much higher price I might add) plus MY six (with only 4 left to sell/trade) and that would make a GRAND TOTAL of 15 chips........FIFTEEN!!!
I really don't think the 'market' is hurt with ONLY 15 known and only SIX available for sale so your estimate to the other post of "the high end of $500" is still valid, I'd think. See you in Vegas!

Steve