If you are talking about early coins, the true definition for a U.S. coin is what is known as “early U.S. silver”, or the Draped Bust silver coins. The most affordable out of all of these early coins would be the Draped Bust Half Dollars. They were in production between 1796 and 1807. Unfortunately, there was a silver shortage for the first two years of production, so there are only a combined 3,000 of these coins for these years.
The front of this coin features a woman with long, flowing hair. On the back is the more commonly featured eagle with E. Pluribus Unum and a shield emblazoned across it. It is composed of 89.2 percent silver, with the rest being made up of copper. While some people give credit to the artist Gilbert Stuart for the design, it is said actually to have been designed by Chief Engraver Robert Scot.
The value for the 1796 and 1797 coins is even higher than it would be on the fact of it being more rare. This is due to the fact that there is a difference in the design. The eagle was made scrawnier on these. The price on these coins is $29,000 for one in good condition, and $40,000 for a coin that is in fine condition. For these half dollars minted in the other years, a good condition coin will bring in $115 and $125, while one in fine condition is between $180 and $250. An 1806 coin that is in very fine condition is worth $340.