[hodge5]

Welcome!
The 300 is a great ATV, with the aftermarket still supporting it, new parts are still available, and there are a gazillion of them out there to pick parts off of.
It needs to be in very good shape for $2000.00. If you aren't sure once you've looked at it, snap some clear, detailed photos, and post them here. Extra eyes on it might be helpful. That isn't the same as being there and hearing it run, but experienced folks may spot issues, or positives, that you might miss.

 

[hodge5]

It looks straight, and pretty original. The front rims don't match the rears, and they've been painted- I would ask why.
I would want to go over it with a fine tooth comb, but first impressions are that it is in original, above average shape.