I've had mine for decades now. I've used the RS-232 output, it's simple to interface/convert for just about anything.
Too bad the volt-nuts will pass on the voltage reference used.
I have 2 of them I bought a few yrs ago when they were below $200 (dirty and took a chance on them but both ended up being just fine).
the voltage ref is not 'volt nut certified' you say? its not a 6.5digit meter, though; wonder why a fluke design from that (good, old) era is not acceptable to those folks?
the build quality is great; very robust and reliable and not much to go wrong.
if the display starts to fade on me, I'll probably upgrade it with my own display and controller (the rs232 control port on the back is the key and I'll be able to get the data I need and send it to some other device for display or maybe retrofit my own display inside the fluke, should the real vfd not be buyable anymore.
btw, one trick to restore the shine to the plastic display is toothpaste and cotton cloth. an old tee shirt works great. use your finger and dab some toothpaste (a fine polishing compound, really) on the display and rub with fingers. use a cotton cloth (keeping it clean frequently) and use that to polish the plastic lens. on each bit of gear I've had to do that to, it restored the shine and can remove some surface scratches. careful over painted areas, but on the smoked bezels, the toothpaste trick is a pretty well known trick.