If your going to just play around in the woods, a clean 250 2 stroke of any year will fit the bill. I just sold a very clean 2002 RM-250 that was totally set up for the woods (bark busters, skid plate, rad guards, Gnarly Pipe and SA silencer) for $1,700. So I would expect that you should be able to get a similiar deal.
Just remember that when you buy used, condition is king. You want to find a bike that's been taken care of. And if you live close to Grand Rapids, send me an email when you want to go riding!
Rich -
zig06@altelco.net