Same; 10 years, and 5 subarus with various amounts of km's at time of purchase (including a GT Legacy that had done 160,000km when i got it).
1990 GT legacy (Auto) shat the centre diff, which then buggered the front diff, at around 170,000km. Brought at 105,000km Sold at 180,000km.
1995 STI: no problems up to 130,000km (when it was stolen)... Brought at 103,000km.
1997 WRX wagon: no problems (but it did only have 80,000km on it when i brought it). Sold at 99,000km.
1996 Legacy GT: Gearbox was a bit rough going into 2nd, and AFM playing up too (this is at 190,000km) Sold at 195,000km.
2002 Spec C: Alternator quite on the day i drove it home, otherwise, no issues (again, had only done 60,000km when i got it). Sold at 124,000km