I recently purchased a 99 30th anniversary edition OBW... after overcoming (well working on overcoming) my initial "headgasketwillblowout" fear, I love the vehicle.
I'm not sure if it's true but a Subaru dealer can check the VIN with SOA & see if your car has one of the faulty HG's. A good friend has just turned over 130k on her 98 OBW with NO real repairs, ever. So, the head gasket may blow, it may not. SO, "don't let the sound of your own wheels drive you crazy" Jackson Browne
It feels strong & safe, the gas mileage isn't as bad as predicted & it's a comfortable ride with a nice stereo setup.
Enjoy it if you get it.
Later,
Peter