With the current price of 0.58 BTC for Batch 8 Delivery on 9/20/14, and given their minimum quantity of 2 Units, recouping your money = Impossible. (Almost)
Factor:
(2) S3+ Units at .58 BTC 1.16 BTC = $585.00 USD
(1) Corsair 850w PSU $140.00 USD
TOTAL HARDWARE: $725
Now, IF you are lucky enough to have power at a rate of 0.08 kW/hr (unlikely); and
IF Bitcoin difficulty only rose 11% per increase for the next 3 years, never more, (highly unlikely), and
IF you are lucky enough to get units that hash at the full OverClocked speed of 500 GHash; and
IF you are lucky enough, to within that 3 years, not have 1 single technical issue, pool outage, internet issue, power failure, hardware failure, and so on; it can be assumed
You will have made back your initial investment, and broke EVEN, on April 18, 2017.
Strato