I haven't had time to read the whole thread (got to page 7 so far and am getting busy at work, so thought I'd post), but here's some further info that hadn't been mentioned up to that point...
The owner's name was Helmut, something. My dad bought an E30 325is from there in the early 80's, as we lived just down the street on Aspen Forest Dr., for those of you who know the area well.
It was one of only a few dealerships around back then, the next closest being Gulliver's in Hamilton. The Canadian importer back then was the father of Jockem (sp), now owner of Auto West and Hino (sp), who sold to what is now BMW Canada.