Would like to buy but still at the prices maybe S8 will be less in cost or will have a better ratio at power used.
You could say that about any batch. At some point you've got to buy or you're always going to be waiting.
Already have done in the past and I don't see any point buying right now with the current prices and current price I pay per KWh as already calculated figures and buying such machine with use of power to mining and generating coin wont make RIO for me. Prices in UK for kwh is shocking. £0.12 to £0.15 pkwh is shocking so to make any profit would take years without difficulty increase. 1s 7 right now for me would take 275 days to brake even and that is not factoring any price drops or so with bitocin then within that you got the half of block reward so would be impossible to brake even. Already bought in the past didnt see any rewards other than braking even and sold equipment so maybe made 1BTC if that. I will continue to wait and watch and see what happens. If prices come down on units then I might look to buying but right now its a waste for me. I d rather watch and wait to by at right time than to buy now and be out of pocket.