A one-of-a-kind six-seat Maybach 72 is being offered for sale for those who find the regular luxury model a bit too cramped. The car started out as a 2004 Maybach 62, and was stretched an extra 10 decimeters (about 3.3 ft.) in order to add an additional pair of rear-facing back seats. The one-off vehicle is being offered for sale at $780,000, twice what the unmodified Maybach originally cost. Our sister site Autoblog has an image gallery of the over-the-top limousine. Back in October we reported on Maybach's new $1.4 million open-topped Landaulet.