Im landing second hand s9s for $250 shipped including psus and Im at .067kwh moving to a new contract of .04kwh. Just because you make pennies a day off of s9s doesnt mean everyone else does.
Be patient. Soon, you will be buying Brand New S9i's in the box WITH AP3++ PSU's for less than that. There is a virtual Tsunami of Brand new S9i's and S9j's hitting the secondary market. LOTS of Colo's are losing customers and their miner stock piles are sitting on the floors. Not to mention ensuing 7nm technology at our doorstep. I would go so far as to say, that some large Farms are already taking delivery, or are soon, of large blocks of the new tech from Bitmain. Legacy Technology is about to get VERY cheap.