check out this link what about the Obelisk GRN1 Mini it claims to have a 15 day payback
any words of wisdom on this is it fake?
[Cuckatoo31 Mining Hardware Profitability Comparison | Cryptominer Deals](Cuckatoo31 Mining Hardware Profitability Comparison | Cryptominer Deals
are you presently mining a coin and if u are whats your setup if you wouldnt mind sharing