That's actually a ridiculous price, even an X68000 XVI shouldn't go for that much. I've seen them go on Yahoo Japan for about $250, and even when you factor in shipping and middleman fees it would still be cheaper than this one on eBay/
You can always make an offer on it... there is some cosmetic damage (scratches, especially on the lower right front half). I just saw it and figured I'd mention it here... but good call on the price.... I apologize if I made it seem like the deal of the century.