Looking at a 2009 Dragon. Need HELP!

Hey ya'll! Im helping my buddy get set up to buy his first sled. Im an arctic cat guy so im having a little trouble letting him buy a dragon, but it seems to be a good deal. Just wondering what you guys would suggest checking out when i go to look at it? What seems to go on these sleds other then the motor? ahaha. kidding, it has 1990 km on it but just had a factory motor rebuild. So im not to worried about that. How long do these sleds usually last as far as the chassis? Any thoughts are greatly appreciated.