i actually bought a hyper neo geo from him. He was nice guy buy yeah his craigslist post is shady as hell. He said he originally had 12 now he has 2? It looks like those cabs were the only thing there.
The hyper neo does work and i asked him to turn it on before i put it in my car. The other 2 big century's that he has left looked like it was in bad shape though. He probably won't have all the keys for the cab either.
Either way, i'm happy with my hyper neo but i wouldn't pay 500 for one of the others.