This one off Pininfarina is legendary of course. It's in great hands with Gooding and will bring in the appropriate amount for the current owner, and also grace a new deep pocketed owner's garage.
However, be reminded that the final "as produced" iteration of the W113 body shape was only approved after a very long set of styling exercises. I've seen a lot of them while at Paul Bracq's in 2011, and he shared a number of these with me some of which were presented on p101 of Pagoda Style.
Interestingly, one of the first design exercises for the W113, from March 1959 has the "swoopy" coupe like look of the Pininfarina model, though this design exercise was done with wraparound glass for the rear window. When you are not having to fabricate such glass, or make a car with it, it's real easy to design with it! On the Pininfarina model, a more conventional rear window was used.
For those that know more about the Pininfarina and have seen it, it looks like this is truly a coupe with the top not being removable?