500 is to much for ANY cab that you plan on converting. You can build one for 100 with nice wood and a weekend. There is some great plans out there... And you will find that you will remove almost everything from the cab (unless you want to use the monitor).
Next..... This doesnt' have sideart... It's not worth it. You will replace the control panel (or should) so that you can bring a cab back when you want (1) and so you can drill more holes easier. I'm pretty sure that the original had sideart. I have a picture in my head of what it looked like, but go
www.klov.com to find out. So it's probably a hack.... and NO hack is worth $500!
Go to your local arcade and ask around for some crap machine if you really want one. But if I could do it all over.... I would probably have build my own from boards...
btw, I might have a guantlet cab for sale in cincinnati. It was converted to capamerica-> boughtbyme -> mame'd..... but I'm going to make a cocktail table instead. So I might be willing to part with it. Let me know.