If it's a '00 S the Brakes should have been flushed at least 4 times for a truly well-maintained car. Oil s/b changed annually - 8/9 changes. Will need new tires, battery, coolant (150k/5yr.) - unless changed, check plastic window. For me PSM isn't a gotta have, if you can drive, you won't need it.
Lots of choices out there... don't get enamored with the 1st one.
