Classic bmmer and 82 733i BHHAAAAAA HHAAAAAAAAAHEEEEEEEEEEEEE HAAAAAAAAAAAAAAWWWWWWWWW!.
I thought you were talking about a real classic. Treat her like you would any other used car that is 25 years old. Bmmers are at their best in that era as small sedans like the 320i. You'll have issues with reasonable priced parts on a 733i which of course with any 25 year old car with 200k you'll be buying quite a few of.