4. Sherman Tank
Although civilians can’t own or operate military vehicles, several tank collectors found loopholes in their local traffic laws and put license plates on their tanks. Of course, nobody can legally own the latest state-of-the-art tanks, but you can buy the older tanks without any working guns.
One of the most common tanks from World War II is the Sherman M4 Tank produced in almost 50,000 examples for use by armies all over the world. A surprising number of those still survive and some owners even drive them on the road. However, most owners ask for over $500,000 for roadworthy tanks. Yes, it is expensive, but also effective when it comes to a disaster situation of any kind.