Customers who order the 918 Spyder also have the opportunity to acquire a special-edition 911 Turbo S Coupe or Cabriolet.

ENGADGET: Porsche opens 918 Spyder plug-in supercar pre-orders, $845,000 gets you a ticket to ride

The oldest U.S.-sold model they found is a 1952 Strawberry Red 356 Cabriolet owned by Robert Wilson of Oklahoma City, Okla.

FORBES: In Photos: The Two Oldest Porsches in America

We think that's odd, because the old Super Beetle Cabriolet and especially the Karmann Ghia did not suffer a macho backlash.

FORBES: Test Drives

The demand just won't be that high (if you live in Florida, California or Arizona you'd probably just get the real Cabriolet).

FORBES: Overview

An even rarer find, and the oldest Porsche not sold in the U.S., was this blue 1950 356 Cabriolet owned by Richard Brumme of Annapolis, Md.

FORBES: In Photos: The Two Oldest Porsches in America

The latest Beetle Cabriolet is lower, sleeker and longer than its predecessors, and as such it comes across as a modern interpretation of a classic car rather than as a pure retro-model.

BBC: Convertible Beetle back in battle for VW in the US

But as the Omidyars drove their Volkswagen Cabriolet back to their home, furnished with budget brands from a Target store, they felt only more confused--like not a few of the accidental billionaires in the Valley.

FORBES: The Radical Philanthropist

What about a 911 4S Cabriolet?

WSJ: 2013 Porsche Boxster S Review: When You Need a Great Escape | Rumble Seat

For example if a car manufacturer spots a rise in interest in cabriolets tied to the growing adoption of Spotify, then creating a cabriolet model with superior surround sound with the lid dropped, is a potentially valuable micro-market, one among many they might encounter in a six year product life-cycle.

FORBES: After the Debt Deal, Four Trends That Spell the End of Jobs