 The Ford AV8R was based on the P-51 Mustang aircraft, and was auctioned off in 2008 for $500,000.The AV-X10, inspired by WWII-era fighter planes, fetched $250,000 at auction in 2009.The SR-71 Mustang was based on the Lockheed SR-71 Blackbird, and auctioned for $375,000 in 2010.