But while some of the parts kept were the kinds of things you may find in BMW-specific salvage yards or parts one may source from cars they've previously owned and parted out, it still left an impression. Each one held some sort of value: "This diff has a 3.35 ratio, this one a 4.08, and both are limited-slip. This gearbox is the dogleg pattern, as is this one, but it's the earlier version." It was hobbyism at its finest. But this is where the collection takes a turn. For me, it wasn't entirely about the cars that sat in the garage below.