hi mate , i picked up a 2001 wrx wagon 60k , full history , moded , out the trader LAST WEEK ! £6600) Done a full vehicle check on the net hpi,mileage , crash , history etc (£20) .You could also take it a local importer or subaru garage and get a ecu check on it , this will show stored engine faults as long as a ecu reset has not been carried out , new faults should show up (£35).It might be worth asking anyone if they have a diagnostic hand held tool to help you out , i am waiting for mine to come from china !GOOD LUCK !I am new to subaru , be these boys on here should help you out , cheers paul[]