Threw my old KNC Jupiter in the garbage last week and kept the controller. It looks like in the photo below. Will take photos upon request
The controller is sold AS IS because it has an issue during start up. You start it, it makes some kind of whistle noise, and you need to turn it off, and turn it back on again a few times until it finally boots. Sometimes you need to power it on- power it off like 5-6 times before it finally starts hashing.
Once it hashes it works for days. I don't know whether its because its cold or because the SD card is bad quality. Since I only shut off the miner like once a month it wasn't an issue for me.
Price: Highest
Reasonable Offer (If the highest offer is $5, then its not worth the hassle driving to the Post office and its easier to just throw in the garbage)
I am in Canada so shipping will most likely be
Canada - $10
USA - $20
Worldwide - $50 (most likely not worth it)