I have recently purchased a CP-31 with the wash and dry module off of eBay that has been pulled out of a "working environment" and is "fully tested". It hasn't arrived yet but we shall see. Since I don't have 220V wired, I am going to buy a step up transformer, probably this model:
I figure 5000W should be plenty of margin, and no harm in getting a more "beefy" model.
The eBay listing doesn't seem to include the replenishment unit that I have seen discussed here and elsewhere. I have never seen anyone selling one of those separately, and I haven't even been able to find a picture of what it looks like. I realize it isn't needed, but I am quite curious as in the future I plan to operate this in a shared darkroom and hopefully the unit will get lots of use.