I would be more concerned about this:
"The power socket is darkened, the previous owner used incorrect PSU I believe. It is fully functional, just a cosmetic blemish."
I saw that to but what stopped me was the price everything else i would need just to get it to run and then hope that it ran, i went by his ebay profile i would hope hes is as good as it appear. but I'm not buying it after i saw the price of one controller . I d be better off just buying another S5 and save some change. and this question the answer didn't seem right .
Q: How much power does this take?
A: They consume about 300W. Thank you for your interest in my auction!
ID say if it's a full cube like he says wouldn't it run at 1950 W it shows in the spec he does Processing Speed (GH/s):3300