I have 5 S7.
https://bitcointalk.org/index.php?topic=1851244.02 or 3 runs at 4.8 th the rest is at 4 th. I'll check the exact numbers later today or tomorrow.
I can give DPS-2000 psu-s, Geccoscience breakout boards, cables etc... ready to use.
Asking 2200 Eur for the lot.