If its a stock banshee it will probably me ok as far as maintanence. If it is modified it will probably need more maintenacne.
As far as buying a used 2 stroke it has been my experience that every one out there that is forsale has just had a new topend in the last 10-20 hours. I have bought many used 2 strokes. All but 1 had the topend blow up with in a few horus of ride time. I finally started tearing the topend down before I even rode them and it saved me lots of down tiem and money in the long run.
I had the RIGHT to remain silent, I didn't have the ability!