Washington: 1908 model Haar became the most expensive bike sold at auction. Lee Davidson. 9.35 lakh dollars in the auction held in America (domestic Rs. 7.71 crores). P) Strap Tank sold by Harley Davidson. Fuel and oil tanks are integrated with the frame of the bike. This model got the name Lan Strap Tank. There are only 12 bikes of this model in the world.