Thanks guys 
Moral of the story: If you are in it to get at least a return-of-investment ratio of 1 (make everything back, including electricity) just forget about USB Eruptors at their current price.
If you are doing it as a hobby, by all means, do it. It's a fairly inexpensive hobby and a good low-cost way to support bitcoin for the coming 6 months or so.
If prices drop below, lets say 0.3BTC it would be rather interesting and should provide a ROI-ratio of close to 1.
Moral of the story: If you are in it to get at least a return-of-investment ratio of 1 (make everything back, including electricity) just forget about USB Eruptors at their current price.
If you are doing it as a hobby, by all means, do it. It's a fairly inexpensive hobby and a good low-cost way to support bitcoin for the coming 6 months or so.
If prices drop below, lets say 0.3BTC it would be rather interesting and should provide a ROI-ratio of close to 1.