I have 3 RBox 4 miners that I'm looking to sell. Thought I list here first in case anyone is interested. They will do 450+/- GH/s depending on how hard you want to push them. I never ran them higher than 300 MH/z. They should do 320 with a good PSU. Looking for $110 each shipped.
FYI I cut small holes in the top of each housing so I could see the blue flashing lights just to make sure all 4 boards were hashing.
I can post pics if needed