Was fortunate to own a 1983 520i when I was 27 yrs -- only because the owner 'upgraded' to a Merc to impress his female companion.
Maybe the crack on the windscreen had something to do with the decision to sell also.....
Price, then, was RM35K (1987, in Muar).
Unfortunately, fell asleep at the wheel (5am!) drving back from Kota Bahru in 1990 at Gambang, Kuantan and crashed the car. Still after 8K spent, was never the same -- the electronics just went bust and the car can 'die' when you are driving! Nice number too - MP 7227.