Quoted from Fulltilt:I've wanted a 635 for about as many years as I've been driving. I still catch myself looking at the eBay motors ads.
They're fun cars if you like classics and don't mind not having all the modern creature comforts. Also, if you don't want to depend on it as a daily driver.
There are some weak spots on them now that they're this old so if you are seriously considering one, look up a classic 6 series buyer's guide (BMW Mag did one many years ago, it's probably online somewhere) before checking out any cars. The front fenders can be bad about rusting out, if it's got the self-leveling rear suspension (generally on the later 80's cars) it can be trouble/expensive. Overall not bad cars though. Bimmerforums is a pretty good if I recall, but it's been years. Might also look at Bigcoupe forums.
The ultimate would be a gray market Euro M6 but you'll pay. And I do mean pay! But what a great looking car with a pretty fun level of power.
Richard