There's a few used S9's for sale local to me. I haven't bought a used miner before so I'm curious if I should pass on them or move forward with the purchase? He says he has approximately 70 hours on the miners and would take $550 including the PSU.
I'm currently running one S9i in my basement and plan to add 3 more rigs. The used ones are S9 not S9i.
Thanks
It kind of depends on what you want to do, you can buy a brand new S9i 14TH without PSU for $564 from Bitmain and it will come with a 180 day warranty. If you go used, the warranty might not be available or if it is you'll need to go through your seller for any warranty claims as Steamtyme said.