I don't know if I can talk you out of it, but I'll keep trying. That game is probably worth about what they's asking. Offer $400! If you pay anywhere near $750, you might have trouble unloading it later and making money. If you just want it to play, then just go for it... why not? But you normally buy to flip.
The pics of the cabinet look pretty good (some fade), but the playfield has pretty significant yellowing. I couldn't see from the pics if there was wear or not. It might clean up really well, I just have doubts about the margin on that game. It'd be different if it normally sold for $1500, but it doesn't, it's typically < $1000.
Wade