4. Brasher Doubloon (1787)
Cost: $7.4 Million
One man set out to convince New York State to use copper coins rather than gold to create the 1787 Brasher Doubloon.
The State, however, did not accept Ephriam’s plan and stated that they didn’t want any copper coins.
Being the skilled Goldsmith that he is, Mr Brasher ignored the state and decided not to make new coins, but he did mint some 22-carat coins.
These coins are extremely rare and rich in history, making them highly sought-after and valuable.
One coin was purchased at auction by a Wall Street Investment Firm in 2011 for $7.4 Million.