A pound of silver coins is about $500.00
So many were made that even uncirculated coins are only valued for the silver, about $5.00
Mintage data for U.S. silver quarters produced from 1796 to 1963 shows a mintage of 3,138,259,970 coins. The mintage data for 1964 is 1,264,526,113 coins this would bring the total to 4,402,786,083 silver U.S. quarters.
Not including Proof's and 40% silver coins:1976P 117,337,0001976D 103,228,274
While the price of silver is volatile, lately silver dimes have been going for about $2, quarters for $5 and half-dollars for $10. This is just for silver content though, the numismatic value of some coins are many times greater than their silver bullion content.
So many 1964 Kennedy half dollars were made and saved the value is just for the silver, about $5.00