FWIW, Kelly Blue Book is $1895 - this assumes a bike offered by a dealer which would be detailed and in top condition. (This still seems too high to me.) NADA lists average retail at $1350 and low retail at $1030 (for my zip code), so the $950 price sounds like it's a fair place to start bartering if it's looking rough.
I don't know much about the specifics of the little DR, but as long as it wasn't thrashed too hard and service ignored, I wouldn't think the mileage is that bad. It should be able to rack up many more miles. It boils down to your assesment of the bike and if you think it's life has been rough enough to avoid it, or if it's just cosmetics.