If you were to imagine a blue-chip postwar German collectable, chances are it would have gullwing doors and wear the three-pointed star. Well, allow us to introduce you to an even bluer chip: the BMW 507.
It’s true that the Mercedes-Benz 300 SL occupies a perch well beyond the reach of most mortals, trading for somewhere around $1.2 million to $1.4 million at auction. Yet that
