Ralph Lauren's car collection is worth about 600 million.

https://mph.com/news/79/how-ralph-lauren-s-600-million-car-collection-serves-as-his-creative-muse

Ralph is about 85 years old right now. 

the "Count Trossi" '30 Mercedes Benz SSK

owned by Ralph Lauren if I recall correctly, and probably photographed by Michael Furman

Found on https://www.facebook.com/groups/1631935880418477/?fref=nf

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.

Images of Ralph Lauren's collection while at the Musée des Arts Décoratifs in Paris

 Above, 55 Jag D Type...
Below, 1938 Alfa Romeo 8x 2900 Mille Miglia

found on http://driven.urbandaddy.com/2011/05/02/ralph-laurens-cars-raid-paris/

The Impossible Collection Of Cars, a book that sells for between $400 and $700, from Pulitzer award winner Dan Neil with 100 cars featured

The world's most beautifully designed automobiles, but most often only a handful of collectors ever see them or own them, now, The Impossible Collection of Cars showcases the 100 most exceptional cars of the twentieth century.

 Each luxury automobile—from the 1909 Blitzen Benz to a 1997 Porsche 993 Turbo S—was chosen for its revolutionary design, magnificent lines, and head-turning capabilities. The book also features cars owned by celebrities like Marlene Dietrich, Greta Garbo, Pablo Picasso, Elvis Presley, and several of Ralph Laurens collection like these Ferraris:

his $25 million-plus 1962 Ferrari 250 GTO, and below his 1960 Ferrari 250 GT Spyder.

Listed on the Awesomer.com for $410, http://theawesomer.com/the-impossible-collection-of-cars/128992/

 Try Amazon and buy them for $ 405 http://www.amazon.com/Impossible-Collection-Cars-Dan-Neil/dp/1614280150/ref=sr_1_1?s=books&ie=UTF8&qid=1324706422&sr=1-1

A lot of the cars in the book are being posted on http://driven.urbandaddy.com/

Update Dec 2013 the book now has an asking price of 1400 on Amazon http://www.amazon.com/Impossible-Collection-Cars-Dan-Neil/dp/1614280150/ref=sr_1_1?ie=UTF8&qid=1387162118&sr=8-1&keywords=The+Impossible+Collection+Of+Cars