Hey guys I looking to buy a 98 gtp fully loaded with 160kms for around $2500. At a glance it seems like a good deal to me but i took it for a test drive and it seems to have a few issues. 1) the brakes need to be replaced because they are ****. 2) it has a custom exhaust that sounds like it has a leak. and 3) the engine shakes the entire car. So i'm not so worried about number 1 and 2 so much but number 3 has me worried. I inspected the car pretty decently and the engine shakes and kind of makes a knocking sound that seems to be coming from the supercharger. ANY opinions or analysis would be appreciated! thanks guys