I had a really nice 1998 DR350 dirt only model that I used as an inexpensive bike to transition back into riding after many years away from dirtbikes. The bike was excellent. Very relaible, powerful, easy to ride, and pretty fast for a 'trail/fun' bike. With some tuning the suspension is not that bad. It can even be jumped as long as you aren't going for any world records or tripple flips. The downside was that it was a little too heavy for the sandy Florida trails (especially after I added a bigger tank-it doesn't need a bigger tank OR more weight). It can putt around slow with a ton of low end torque (lots of climbing power), or you can blaze down the trail with pretty good speed. It's no racer, but really fun. You shouldn't get bored with this bike. It is not a 'foo-foo campground bike'. Someone said that a XR250 is 'better', I disagree... I have ridden both, and I liked the DR much better, but I guess it is just a matter of opinion.
Bottom line: A clean, well maintained DR350 is definately worth considering. Very relaible, very fun (the 'dirt only/ DR350x' model is MUCH better off road). -Todd