I just bought an '03 GTX that had been sitting 5+ years.....
Got a great deal on it but had to deal with lot's of little crap to get it
back up to speed running good.
You can figure on:
--Gas in the tank is most likely bad.......these machines run crappy until you
get some good, fresh gas to it.
--Bad gas makes the plugs foul.......they will need to be replaced.
--Battery......of course it will need to be replaced. Mine was $85.
My advice......look it over REEEEEEEEL good and take it for a long test-ride
before you buy it.......