Well people looking to buy some S9's they are currently on sale on the bitmain site. They are 12.5th/s Recommend jumping on them while they are still in stock
EDIT: Well this time they sold out in less than 2 hours i managed to get 4 of them with 4 1600w psu and 1 2600w psu
but in the future i will try to get some of Finiskies 4kw psu.