Kyle, buy it, but realize you need to do the timing belt + water pump AT THE VERY LEAST. Some other candidates for inspection: Tires, tie rods, ball joints (to check for ball joints, crank the steering wheel to each side and do full circles. If you hear a pop, you've got a bad ball joint), shocks/struts....having said that, even if most of that stuff is in bad condition, you'll STILL be getting a good deal. That is considered low mileage for a vehicle of that "vintage." Things I would automatically budget for if I were buying that vehicle: timing belt, water pump, flush coolant, diffs (oil), plugs, and wires, possibly fuel filter and pump as well.
SubiOB, those old cars have roughly the same AWD your car has, just less electronics, like traction control (which I'm sure actually detracts from driving in inclement weather, if you know how to drive in the snow.) They are amazingly simple, and amazingly effective. If you watch the value of most other cars that old, they hit rock bottom. Subaru's are like Toyota pickups - the resale value is generally higher because of their utility factor. Some people want cheap vehicles so they can spend their money elsewhere. So when we all see a Subaru with these stats going for this cheap, it's a no-brainer (to us, at least.)
Besides all that, your question might be somewhat inappropriate. It's sort of like asking someone "Why do you shop at Goodwill when you can just go down the street to Nordstrom's?" Of course we all want a new car, but not all of us can experience that luxury.