The most expensive motorcycle sold at auction, 1910 Winchester, $580,000

Found on http://thevintagent.blogspot.com.br/2014/04/the-worlds-most-expensive-motorcycle-or.html

Winchester, the legendary name in American guns, and for a very short while (1909-11) sold motorcycles under its badge, using single-cylinder Marsh-Metz engines. The Winchester was clutchless with a flat belt direct-drive, and a total-loss battery ignition; motorcycling at its most basic, yet still selling for a very expensive $160.

 Apparently around 200 Winchesters were produced under contract by the Edwin F Merry company in San Francisco,