There are only two of the Bugatti Atalantic type 57SC, one at the Mullin Museum (highest price ever paid for a car), one in the Ralph Lauren collection.. but even cars this expensive have been in the classifieds

 above from my post 2 years ago http://justacarguy.blogspot.com/2010/01/some-amazing-things-turned-up-in.html

Bottom image from http://karamelocycles.blogspot.com/2011/06/bugatti-type-57s-atlante-1937.html

3 were made, one was hit by a train in 1950. So one of the above was the car in the calssifieds.

some amazing things turned up in classifieds, a Bugatti 57sc Atalante, and a wonderful 1930 Morgan 3 wheeler van/beetleback

Classifieds, all sorts of amazing finds; a variety

Classifieds, all sorts of amazing finds; Famous people's cars, and the Polynesian

Eddie Hill, top fuel driver

Fastest car of 1958, the Mickey Thompson - Voight streamliner

Bruce Crower's record holding Bonneville racer

Eric Rickman, photographer for Hot Rod magazine

Classifieds, all sorts of amazing finds; race cars, record holders ... (from the 50's and 60's)

Classifieds, all sorts of amazing finds; Duesenburgs, '35 and '39 Bugatti type 57-c, Tucker, Lincoln

Turbonique ( bolt on 850 HP ) advertising, the Turbo Axle and the "AP" supercharger, plus a couple that were in the classifieds

Jack McClure's go kart at the 1964 Louisville Auto exhibition, powered by twin Turbonique t-16 jets, it turns 152mph in the quarter. 400 lbs of thrust.

This is more info on Turbonique than I've ever seen in all of my searching on the internet... all that I've posted before is here: http://justacarguy.blogspot.com/2006/12/once-men-were-allowed-to-be-men-crazy.html and http://justacarguy.blogspot.com/2008/03/turbonique-1000-horsepower-bolt-on.html