I assume that the genetics have been proven, and this is why... The urban python said, on their website, that the project of from a sandblast wild caught male that was bred to a normal female. The offspring was wild type. So at that point the male sandblast was the only one. So now if this person is talking about buying a female sandblast, then unless they caught a female sandblast in the wild, this male would have had to been bred to his daughters to produce more sandblasts. Correct me if I'm wrong.
I would imagine that the price for these would be fairly high, since they are so rare, but don't know an amount.