This is going to sound very naive, but are they connected to block auctions? Iām not familiar with the eBay seller that has this marble, I found it just because I was looking for bricks. Admittedly Iām still a greenhorn
Edit: (I just looked it up and answered my own question)
If they say something is a CAC, how reliable are they? Is there still decent room for error on what they call something?