These are pretty durable cars That said, you will be on a continual maintenance program since it is a 20+ yr old high end vehicle.
Personally, I would never have bought one with an automatic. They seem to last fairly well when maintained but maintenance is often difficult to verify on cars of this age. At 210k miles, you are on borrowed time, few of them make it beyond 250k. It will not shift like a modern auto, because it isn't. Just make sure the fluid is the correct level and a nice red/pink color with no burnt smell. I think there is also a cable adjustment near the throttle body that affects shift points, make sure it is properly adjusted, I suspect the procedure is in the Bentley manual.
Current ride... '13 GTI Wolfsburg
BMW's from my past...
'92 535i/5 '89 325ix/5
'98 750iL '86 325(e)/5
'95 740iL '84 318i/5
Last edited by snowsled7; 01-13-2013 at 10:25 AM.