wondering what you think I could get for this machine.
Not much.... When you consider that the boards are not working and the case isn't an original.
You could break it down and sell off the parts.... But even then you might not get much for it.
The reason I say this is, that you have to remeber that people can pick up non working machines for $50 or less. Sometimes even for free if they go to their local arcade dealers.
You might be better off breaking it down and using the parts on your own projects. Especially the monitor.
Best Regards,
Julian (Fozzy The Bear)