I am stationed at Fort Leavenworth and just completed my 30,000 mile service. After replacing filters, sensors, transmission fluid, realignment, radiator flush, transmission service, and front/rear differential servicing, the total came to around $1400 with tax. Kind of high, but the car is paid for, and it is 30,000 miles, so if you look at it from the perspective of your mileage and what you are driving, $1400 isn't that bad. If it was every 6,000 miles or so I might get a another corvette or another XKR, or maybe even a SL Merc. Not too bad in my opinion. If you wanted cheap servicing and maintenance you should buy a Corrola.
Consequently, I just did my income tax yesterday, and I am getting back $1285 dollars. So my refund covers the cost about 90%.