I have been searching for a good "buyers guide" for the 8 series but I am coming up short. So, I would appreciate the feedback and comments from some of you 8-series owners. Particularly known problem areas, differences between the 840's and 850's, particularly problematic years, etc. I have heard (unsubstantiated) that these cars are electrical nightmares. If so, please let me know what kinds of electrical problems one can expect. I am very interested in what kinds of "big ticket" maintenance and repair items one would expect at about 100,000 miles. And, during a pre-purchase inspection, what would you advise be looked at (apart from the general condition of the car). Thanks in advance!