I have a X68000 ACE for sale on ebay now http://r.ebay.com/cYRnO0 (http://r.ebay.com/cYRnO0)
It just comes with computer, VGA cable and joystick. It does boot and run.
Let me know if you are interested or have any questions about it.
I also have an original X68000 CZ-600CE which I haven't listed yet. It is more complete with keyboard, mouse, joystick and Sharp color monitor. Let me know if you want details or information on this one.
Thanks,
johnl