[lgb240]

I had an '85 535i - one of the best cars I ever owned. It's extremely well built (they were $40K+ in '85 dollars) I put over 465,000km on the car. Nothing other than alternator brushes under the hood. I did have to do front end bushings, control arms, ect. These cars are perfect to eat up highway miles. They are also surprisingly quick around town.
Get a 535i or 535is, or if you can M5 - the original definition of sports sedan. The 528e is not for enthusiastic driving and pale in comparison.
It's very difficult to find nice ones today, so shop wisely. Euro bumpers are a must. Good luck, you won't regret buying one.