Oh, so 100$ gets you a working game? Hmm, if that's the case, sure you could probably reuse some of the components (esp the monitor if it's still in good shape.
But there are also a lot of collectors interested in those kinds of cabs (esp if they're still in decent shape, and definitely if they're still working).
You might pick it up for 100$, clean it up, give it a gentle restore and resell it to a collector, the use the cash to buy a gutted cabinet.
If the boards are still in it, you might donate them to the Mame team also (if they need them).