Thanks a lot for the reply and the feedback on the bill. I was kind of in an emergency situation since I needed the car back within a few days and the work already started on it. I called them just a few minutes ago to share my researches about parts and so on, but they kind of promise me it is all good and nothing overpriced. I tried to negotiate the total price, but no success. I guess all I can do is leave a honest rate explaining the situation after the repair. I agree with you, the total should be probably not more than max. $6500.
Thanks again.