10. Sherman Tank
Although civilians cannot own or operate true military vehicles, several tank collectors found loopholes in traffic laws and managed to put license plates on their tanks. Of course, nobody can own the latest and state of the art tanks, but you can buy old tanks that don’t have working guns.
One of the most common tanks from the Second World War is the Sherman M4 Tank, which was produced in almost 50,000 examples and used by numerous armies all over the world. A surprising number of those still survives, and some are even functional and can be driven on the road. However, the owners ask over $500,000 for roadworthy examples.