With the rising difficulty this Bitcoin mining hardware quickly loses its value. One of the top Bitcoin mining hardware manufacturing companies Bitmain has recently raised $20million in first round funding to expand its business. Currently you can buy the 180GHz S1 Antminer for about $250. You can review their product page here. At the current difficulty this unit would earn about $5 per day, That is strictly mining Bitcoin and not contributing to any other Alternate currency networks hash rate.
Here is the hardwares technical specs straight from the creators:
Hash rate: 180 GH/s