But don't forget, a rather higher upfront Charge for the unit from a trustworthy vendor with confirmed general performance can typically be less expensive in the long run than handling defective devices and dropped mining time. There is an not known connection challenge concerning Cloudflare and the origin Website server. https://usedantminerz15forsale32839.wikibriefing.com/4112099/what_does_used_bitmain_antminer_z15_pro_mean