Looks like ESISO still has some for sale for $381.00[1]. You'll still have to get storage, more memory (if you want), and a gpu.

The single PSU of the chassis that supplies power to both nodes does require 220V power, but I solved this easily enough with a 2000 watt step up transformer off of amazon. I've also jerry rigged up an additional ATX power supply as the native chassis psu doesn't have 6 pin power connectors to power the GPUs.

I've never calculated how much power the thing pulls under full load, but considering that I've never had any instability I've got to assume it's less than the 2000 watts tha transformer can handle + the 400 watt ATX psu for the GPUs. I've got flat rate electric from my landlord, so it's essentially free to run for me.

[1] https://www.ebay.com/itm/QUANTA-OPEN-COMPUTE-SERVER-2x-NODES...