I see an Alibaba seller offering Antminer S11 pre-order for $2900 - $3500.
Features:
Pre order of Bitmain AntMiner S11 22Th/s with PSU Preorder Ship on May 20-June 20:
Hash Rate: 22TH/s depending on batch. Variation of ±5% is expected
Power Consumption: 1340W; at the wall, with Bitmains APW3 PSU,93% efficiency, 25°C ambient temp; expected discrepancy of +10%
Power Efficiency: 70 J/TH; at the wall, with Bitmains APW3 PSU, 93% efficiency, 25°C ambient temp; expected discrepancy of +10%
Rated Voltage: 11.60 ~13.00V
Chip quantity per unit: 189x BM1387
Dimensions: 350mm(L) x 135mm(W) x 158mm(H)
Cooling: 2x 12038 fans; Front fan: 6000rpm, Rear fan: 4300rpm
Operating Temperature: 0°C to 40°C
Network Connection: Ethernet
Frequency: Automatically set