Free to a good home, one Fluke 5440A Direct Voltage Calibrator. This beast is/was used to calibrate other lab equipment: meters, power supplies, etc. I do mean beast, approx 4 rack units high and 2.5 feet deep. Weighs 50lb or so.
The right LCD (messages) is cracked, and it has a couple of errors which can be seen at startup, but I was able to coax 600V out of it (DMM maximum).