Looking at the auction you show - I would have to ask myself - How many of them are out there in this condition and how many collectors collect this high value (face) chip to begin with ? - As far as useing the prices from price guides for my self (opinion) - The prices listed are someone's opinion - I guess the seller can sell it for what ever he want's - But that does not mean that someone has to buy it - Bider's do your home work before you bid - Not every one has a up to date book and all chip guides do not have the same price for the same chip ( even up to date guides) This is NOT meant to step on anyone's toes - Just my thoughts .