Last week I ran across a 1985 Ferrari 288 GTO at a local repair shop in Tucson, AZ. It was a one-owner car (1 of 270 built). I took some photos but had to promise not to post them. So here's a photo from the internet. This was easily the rarest car I've ever encountered outside of a car show.
Here's an old R&T article for fun
Edit: fuck it, have a photo of its ass