Turbos don't need any special service at 60k. They much like the rest of the engine need their oil changed on a regular basis thats pretty much it. On a stock turbo car the most you have to worry about is the car being shut down hot and the oil coking inside the bearings. On the subaru however there is a coolant "surge tank" on the passengers side fender that is designed to help the turbo cool down even after the engine is turned off. The coolant from that tank runs through the factory turbo and down in to the back of the cylinder head on that side. Very cool set up.
I will say my mom had an 02 WRX, and never really had any major problems w/ it. A few minor upgrades and they get to be lots of fun. Just don't think its an indestructible race car, the transmissions won't handle violent launches too many times. Check out the nasioc forums for more info on the good and bad of the old bug eyes.
As far as trading, there are too many variables including your driving habits/lifestlye to take into effect.