I am considering buying a 2008 WRX G3 MY08 5spd AWD and the only known mechanical issue is a boost leak from an unknown place or reason. im wondering if anyone could give me a rough price range that i would expect to get it fixed at a shop. i know that it could be as simple as a clamp or new hose. but i also know theres a chance it could be more serious. what is the highest i could possible expect to pay. ?