I'm looking to buy two S21 (200TH) miners for 3.2K$. I would have a space for them where electricity would be 0.07$/kwh, very cold temp most of the year and high speed internet.
Since I've never done mining, I have a few questions...
Is it safe to buy used miners? (Any ways to ensure the firmware is leggit?)
What do I need to hook them up? (UPS, racks, ethernet cable?)
Is it a good miner to acquire (since it is recent) or should I deploy more capital to get newer one?
What else do I need to think about?
Basically I'm a noob and want to learn :P
PS.: I'm technical, so it doesn't scare me that much and I see mining as a way to acquire sats, not a way to get rich quick.