Like I said, they've been popular so there are probably some "built" used ones out there. As for seat height, I can't tell you the exact measurement but I'm thinking it's about 33-34 inches, tops. My son just bought one for a playbike and it's about exactly the same seat-height as my wife's XR200. My wife is about 5 ft. and is very comfortable on both...my grandson is a bit shorter (going on 10 yrs. old) and he rides both, no problem.
My son's is an '06, I think...he got it for $1700.