The term "American Eagle" is used only for modern bullion coins. Your 1942 coin is likely a Walking Liberty half dollar, but with out a denomination, I don't know. Post new question.
It would depend on what type of American Eagle coin it was. An American Eagle one ounce silver coin would be worth silver spot price, which is just over $21 a the time of writing, a one ounce...
it is worth about 80 dollars if its uncirculated if proof, 90 dollars
As of 04/2011, Numismedia and PCGS quote prices much closer to the market value of silver, about $40 at the low end and $50 for...