Asking $250 + Shipping OBO.

AntMiner S2 SPEC:

Hash rate: 1,000GH/s
Power consumption: less than 1,100W from the wall
Power efficiency: Around 1.1Watt/GH/s
PSU: 1000W produced by Enermax, 80PLUS gold
4U Rack (442mm * 432mm * 177mm)
Built-in 1000W PSU
Plug and Mining
Stable and quietly
*** This miner has a built-in power supply ***

Bitmain Technologies Limited is proud to announce ANTMINER S2 that features 1TH/s Bitcoin Miner, consist of high-density chip chains and ultra low power consumption.
 
AntMiner S2 is using the state of the art BM1380 chip, targeting the best possible power efficiency. S2 is built into a 4U size box, and it will come with PSU manufactured by Enermax.
 
S2 will be very convenient to deploy.
 
S2 is still running quietly.
 
**This will be a final sale non returnable. Due to the dynamic nature of Bitcoin mining, there are no refunds, and all sales are final.
**This miner was tested and configured ready for use.

**1,000 GH/s not guaranteed in your situation. We had a constant average 1002 in our network.

**Unit is used and sold as is.

**Need setup help? Please go to Bitmain Tech website and download the support PDF. The unit is shipped set to default at 192.168.1.99