does it purr like a kitten still?if so, your good to go for now but with that many miles parts may start failing especially if its all original,just remember that.but it looks and sound like you should jump on it.i probably wouldve.i got a 2000 gran prix gt it had 135k on it.after a year i ended up replacing the tranny and it the car ran and looked good.the only thing was is i didnt check on the previous owners and its maintenance schedule like i should have,but i tinker with cars alot and other than that and normal bolt on parts failing here and there its not left me on the side of the road yet. now it has about the same amount of miles as the one your interested in.just go with your gut if after youve checked everything else about the car.like i said i probably would after looking it over,test driving it and hearing it run.heres a suggestion,take it to a garage and have them put it on a computer and see what it pulls up.if the computer lists a couple of items,go ahead with it.they could be easy fixes like a sensor or something.some sensors are easy to change but they can be expensive,dont get me wrong not trying to scare you but most of them run 20 to 40 bucks each. others are higher. just some info from someone who has been there with these cars.my pontiac as i said hasnt put me on the side of the road yet.unlike a ford i owned.i hate them damn things.i used to have a 77 gran prix had a 400 big block in it and it would fly.it was a beast,i mean a tank kind of beast. lol good luck dude.if you decide to get it you may not be disappointed.im not with mine,even with its tranny problems it had.