Depends on the condition and area.
For the Ms Pacman or Galaga machines in New York:
Falling apart water damage cab: $20-$60. Depends on what parts are left in it and if it still manages to work or not.
Bad shape missing pieces: $50 - $120.
Bad shape complete not working: $150 - $250. It could be just a fuse, or it could be that you will have to take a multi-meter through the entire thing to find out what is wrong with it.
Bad shape complete working: $250 -$350.
Good shape complete not working: $200 -$300. Again, it could be just a fuse, or it could be that you will have to take a multi-meter through the entire thing to find out what is wrong with it.
Good shape complete working: $450 - $600
Factory Good shape complete working: $600 - $1000. To be here though, the machine needs to look perfect. The wood has to look new, the metal has to look great and shiny, the CPO needs to have no wear whatsoever, the marquee needs to not have any fade. Basically it needs to have been home use only or stored in a climate controlled area for 35 years.
For the Combo machine, known as the Class of 81, expect to pay anywhere around $700 - $1200 depending on condition.