the tranny's syncros tend to go out around that point, depending on how it was driven.
Thats a good price. mine has similar milage and i got it for $5k.
Before you buy it, spend $100 and take it to a mechanic to check it out. they'll be able to tell you if there are any things wrong with it. also, there are a few alltrac guys in new york. have one of them test drive it for you and ask their opinion on the condition.
If anything is sounding funny, you may want to get it pressure tested with a leakdown test to make sure the engine is good. check the CV boots for cracks and tears. make sure the rear diff mount is decent (it makes a difference, i bought mine with a bad rear mount), ask lots of maintaince questions like when was the last time all the fluids got changed, wearable parts got replaced (brakes, clutch, ignition componants, etc.), and so on. Is it raced or driven hard on a consistant basis?
if it still sound good after all that, then definant get it. if you see the car costing another $10k in the next year, you may want to pass unless you have the funds.