All jokes aside, the vendor here on PCF, The Chip Room is the only entity that I know of doing this at this scale.
I would imagine it could be done by others, but I reckon there is an ENORMOUS amount of stuff that goes on behind the scenes. From having all the right connections in the business, to having the massive capital upfront for the purchase, to having the legal representation, to getting the trust among these casinos corporations, etc.
I cannot imagine the casino companies (or their liquidation companies) that are looking to unload the chips will trust just anyone. They would likely rather deal with a buyer who has done this before, can guarantee payment, and can dance the legal foxtrot.
I’m thankful we have the Chip Room here on PCF.