This series of quasi-slabbed chips inside an Upper Deck concoction includes a whole series of the Dunes "Commemorative" chips (various denominations) with open & closed dates on them. (That is, fantasy / souvenir chips worth, perhaps a couple of bucks).

But here's a "$5000" Dunes, implying it's a real chip that was in play, on sale for only $169.59. Better jump on it fast! It's been curated so what else do you need to know? If it's been slabbed, it must be OK, right?

https://www.ebay.com/itm/335686590720?_skw=goodwin+museum+chip&itmmeta=01KY7RK7JZP16ZZREKJ3VZDBFS&hash=item4e287ae100