If it was restored, you shouldn't have any problems.
If it was shopped, and called restored, then that is a different story.
The common things are strobe light working, SOL hole beat to crap, and the mech that makes the mother ship vibrate.
Not too many things on this that can't readily be fixed. The only difficult part to track down is the middle ramp. For some reason they did not reproduce these on the last run and go for crazy money. That is only a cosmetic thing though, as they really don't effect game play if cracked.