Solid cars, but have your tech check the head-gasket. They're much better by 02, but still a problem. The AT is super solid, outlives the manual, actually. The only thing to look for is the time it takes to engage D or R. If there is a real lag, an engagement seal is gone, and the AT is shot. Happens on poorly maintained transmissions, so if the car was cared for, shouldn't be an issue. Wheel bearings are a tad pricey, so make sure they're not howling. Front half-shafts get killed by engine heat, so have the boots checked, and if they are gone, DO NOT bother replacing a boot. You can get a new axle installed for about $50 more than just the boot. About $300 P/L for an axle, so not a huge deal.
If the timing belts were not replaced, then you need to have them done, and at 219K, NOW. If not, I'd take $1500 off the price, right away. If you want to keep it for a while, and you're changing the belts, have them replace the coolant pump, front main seal and belt tensioner. Should be ~$1000 for everything, vs. $600 for just belts. Lots of labour to get in there.
One you own it, go to a Subaru dealer and buy the "coolant conditioner." Change the coolant and be sure to add the conditioner, following the instructions on the bottle. Easy, and all used Scoob buyers should do this right away.