[Jesset100]

I'm looking at a 2004 BMW 325i with 87,000 miles that I might buy from a privite seller. The car was in a rear end accident and the rear bumper is new with no tub/frame damage.
The tires need to be replaced as well as the 90,000 mile service. What is the cost of the service and what does the service include?
I went to Kelly blue book and put this car as fair and KBB said it's worth $12,320. Tires ($320)& service($?) will be taken out of the price of the car thats why I need to know how much the service is.
Thanks