Purchased my first car (SURPRISE! also a Grand Prix lol) with 157k on the odometer and it runs excellent. Kinda stole it from the guy though, it had an engine problem that my dad (an auto mechanic) said was easily fixable...cause of that I got it for $2,200 when now with the engine fixed it blue books for almost $5,000. Like others have said as long as the tranny seems good I'd go for it. These engines are one of the best GM ever made so I wouldn't worry about the mileage on the engine, just make sure the tranny isn't shot.
