I'm buying a 2008 G6 GT 4dr sedan with 3.5L v6 this Friday, the car has 93,000 miles on it and I'm buying for $3400USD. One owner and the guy has every service receipt and never been in an accident. Good buy?? How much longer do you think this will last me if I keep up on good maintenance? Also any extra tips are appreciate as this will be my first Pontiac. Thanks!