The estimated $880 for the 30 K service *does not* include changing the plugs. For an '01 Boxster this is recommended at 60 K miles...If the plugs were to be changed the dealer would charge a total of ~$1200! Sigh....
But still, ~ $880 for changing the oil, filters and performing the checks sounds like a rip off to me...
Believe me, I don't like picking my wallet unnecessarily
Humberto-