4. Hildebrand & Wolfmuller – $3.5 million
via wikipedia.org
This bike was only manufactured between 1894 and 1897. It was the first motorcycle ever produced. It’s neither very fast (28 miles an hour top speed) nor very heavy. Back then, motorcycles were not machines as powerful as automobiles, but, as their name promises, bicycles with a rinky-dink put-put motor in them to help a panting man sail uphill. Most of the existing copies of this bike are in museums in, to name a few, Germany, London, Detroit, Maine, or Indonesia.
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