I have the chance to buy a 1990 BMW 7 series sedan for $3700.00. The car has 220,000 on it's odometer. The engine was replaced 3 years ago at a BMW Dealership. The new engine has 44,000 miles on it. The Car has had new rotors, radiator and the Air Conditioning system switched over to the new RJ system instead of Freon. The car drives great and has very little rust. I am thinking about purchasing this for my 16 year old daughter. What will the annual Service and Maintenance costs be for this car? I have never owned a BMW. Is it worth it for her 1st car?