I bought the car from Lockhart Preowned, 56th and keystone. I believe this car has only been in Indiana for a few months, so I reckon you've never seen this particular one, however a black/black M coupe is about as common as the rare gets..
I've been down to Putnam before, but I've never driven the track. Looks like a fun track, and I know the porsche club and BMWCCA has at least one event a year.