There are many clones out there that all more or less do 1Thash for 1000W at varying pricepoints but the best deals run around $3000 for the box itself and then varying shipping costs.  They are also overclockable though you would have to upgrade the power supplies or add a 2nd power supply for this to be stable long term-I managed to squeeze out 1.2Thash out of my box and I'm gonna add a 2nd PSU so it can be run like this longer term.  I paid $3400 for it to be overnighted to the US at the end of March, though customs clearance did take almost a week and it seems like the prices are cheaper now.  The quality of the casing isn't nearly nice as the Cointerra units and the software is also less polished, but the lower power use and stable hashrate is a big plus.

Then there's also bitmain's Antminer S2 units who are comparable in terms of power draw.