Personally, at $5k or less it looks like a pretty good deal. I would go into it like Bluehands stated. Buy it for the casting and budget to restore and replace electronics and wear items. (bearings, shocks, etc can be bought on the open market. )The original electronics are amateurish at best. The spindle appears to be a servo of some kind, not sure what was put on those models. Mine has an induction motor, with a spindle you should be able to do rigid tapping.
I've delayed mentioning this, because I'm not 100% that I want to sell, but I have a 2 year old Torus pro that would be turn key.
Torus Pro
Power draw bar
Servos
Industrial electronics
80/20 enclosure
4th axis
UCCNC on miniPC + Touchscreen
Located in Kansas City