I've used this for ~1 month with no problem. I am selling off my mining hardware because I can't absorb the electricity costs where I'm currently living.

20 BTC Shipping included.

4 Sapphire 5830s. Never flashed. Run 3 weeks at 900/300 for 294Mh/s each using phatk.

50btc for the set, shipped, or 15btc each.