S9 for 580 with a psu will turn a profit if you have cheap power.
https://www.ebay.com/itm/234282160679?I have zero idea if the seller is any good.
I have zero idea if the gear will work.
But it earns 38 cents a th and does 13th or $4.94 a day
if you have 10 cent power it burns 3.12 a day so 4.94-3.12= 1.82 a day profit.
but if you have 20 cent power it burns 6.24 a day so 4.94-6.24 = 1.30 a day loss.