Forbes’ Top 10 Most Expensive Cars of 2012 Published on September 17, 2012 in Top 10 by Gilles Olivier Photo: Maybach 6 - Maybach Landaulet ($1.4 million). Even though the production of Maybachs has come to a halt, this Landaulet is still for sale. Under the hood lies a 630-horsepower 6.0-litre V12.