So what's the general consensus on S7?
Expensive but long term gain worth it?
Or but cheap S5 at like 0.9/0.8btc per miner?
Perhaps I misunderstanding what you mean by "cheap".
Today they have 843 items of S7 in stock for 1923.0 USD(8.25672356฿), which will give you 4,860 GHS.
As a comparison, they have 616 in stock of the old S5s for 367.0 USD(1.57547107฿), giving you 1,155 GHS.
Of course the maintenance and power fees differ between the machines.
Maybe this person was referring to the market price of the antminer s5! I teems to be around 0.9 btc