The post-War R51/3 is one of the all-time classic motorcycles, and instantly recognizable as a BMW?complete with early boxer engine and ?plunger? rear suspension. But despite their venerable age, R51s can still be picked up at auction for less than US$20,000.
Over 18,000 R51/3s were built, and a fair few of those are slowly decaying away in sheds ...
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