It's due for a timing belt, so if that has not been done figure that into the cost. Honestly, that price seems a little high. Not out of the balpark, but probably not a great deal. There were quite a few changes through the years. Particularly with respect to the awd system that would have as compared to the earlier traditional 4wd set up. Also I don't believe the later version were offered with rear elockers. There were different springs used also, 99 being the tallest and the 01-02 being the shortest. I wouldn't be concerned at all about the mileage though other than the belt.
I have a 96 limited and I'm very happy with it. I get about 20mpg on average and it seems to have enough power for my needs. Could it be more? sure, do I need more? no. It tows my 17' sailboat just fine.
Edit: I looked around a little, and I guess that price is better than I though. I see a few sub 100k 02 ltds in the 12-14k range, but most are around the $15k mark. I guess if it's well cared for it may be a good deal.