I didn't know for sure that they were called minners an begginer's mistake i guess thats why i've asked your opignion i know you guys are more experienced in this domain .

I have a french supplier that pointed to me Whatsminers M21S – Bitcoin 56Th/s and  Canaan Avalon 1066 and Canaan Avalon 1066 PRO  wich were at a price of 1060$ and 990$ and 840$ i find that there price was resonable except they were quality of course, so i would like your guys opignion on those on particular cause im really intersted in them 

thanks for your quick response and your advices .