2. The 1949 E90 AJS Porcupine – $7 million
This bike is extremely rare and its racing history is outstanding. Therefore, it costs $7 million. There are only four units such as this in the world, and the company created this motorcycle has some financial issues, which explains the low number of units and the hefty price tag. The 1949 E90 AJS Porcupine is graceful and innovative, and it must live up to the expectations as well as the cost.