Did Bitmain ever even ship any X3 miners? They are supposed to be shipping right about now. I know they were selling them for like $12k, then took them off the site when Monero devs said they would be bricked, then lowered the price, but have always seemed to be out of stock.

ZEC devs seem to have little interest in remaining ASIC resistant at least not until after Sapling, which last I heard wasn't expected until September 2018. If the numbers on these machines are legit, these would break even by then.