#4 – Hildebrand & Wolfmuller – $3.5 million
This bike is the first modern motorcycle to be produced. The Hildebrand & Wolfmuller motorcycle was produced only between 1894 and 1897 and the top speed of this bike is only 28 mph. However, if you have the money to buy this, you’re not buying it for its performance. If you want a piece of history, it’ll cost you a hefty $3.5 million.