While doing a search for something else, I came across these slabbed chips (but no grade specified).
It seems they're using these chips for Bit*coin valuations, but after the label is removed (and value cashed in) you're left with the no-value chip which someone slabbed.

I have no idea on the supply/demand for such items. It's foreign territory to me. But the asking price seems a lot for what you see. There's a number of these on eBay with various denominations, etc.

Link is here:
https://www.ebay.com/itm/335779547893