Are we sure these mites are snake mites? They use cypress mulch, if I recall correctly, and that can lead to wood mites (which are harmless to snakes).

I have purchased a total of 12 ball pythons from BHB this year. I noticed one mite on one of them shortly after I got her. I used provent a mite on the tubs and never saw another one, dead or alive (and I keep on unprinted newspaper). I believe if it were a snake mite, there would've been more than one.

All 12 snakes I purchased were healthy and are doing well.