Currently, 1 block is worth ~23 USD, and a single rig of 6 GPUs is capable of finding 1 block per day at current difficulty. Bismuth is one of the most profitable coins to mine right now.
~23 USD/day on 6 of which GPUs? Forgive my ignorance, but is that supposed to be good?
One block is now around $90 USD (14.5 coins @ $6 USD each). The price rose.