A few might accidentally slip out, but it would be very unexpected. When the price of silver shot up in the 1960s nearly all silver coins were removed by people who could sell them for more than their face value. The recent run-up in silver prices has had a similar effect on any coins that might have inadvertently been missed.
Technically all versions of existing denominations are legal to use, but it would be foolish to spend a silver quarter as 25 cents when it could be sold for $2.75 to a metal dealer.
The 1960-1964 quarters are worth about $2.50 each for the silver 1965-1969 are likely just quarters
Do you mean 1,997 quarters, or quarters from 1997, LOL? In any case they're worth 25¢ each. Out of curiosity, because these are readily available in pocket change, what made you suspect they are valuable?
U.S. quarters dated 1964 or earlier are 90% silver and worth more than a quarter.
They aren't. A lot of 1972 quarters were minted, none of them contain silver. They are worth only $.25.
Quarters from 1964 and earlier are often more valuable than those from later years due to their composition; they are made of 90% silver. As a result, their melt value exceeds the face value of 25 cents, especially when silver prices are high. Additionally, quarters from specific years or with rare mint marks can also be more valuable to collectors. Collectors often seek out these older or rarer quarters, making them more sought after and valuable.
Not any time soon. Millions and Millions of each were made that it is very very easy to find them in circulation.
Quarters have been issued since the 1790s so there are many years and mint marks that are valuable. You can get an overview from a site such as http://www.coinclub.com/prices/ At least within the last hundred or so years, two of the most valuable quarters are a 1901-S Barber quarter and a 1916 Standing Liberty quarter.
the value of the painted quarter is worth the same as a unpainted quarter
None of the bicentennial quarters made for general circulation have any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.
The Mets most valuable player for 1969 was their Cy Young Award winning pitcher Tom Seaver.
Not much more than circulated state quarters. They're not old or rare enough to be especially valuable.
Zero. Silver was removed from dimes and quarters starting in 1965, and replaced with copper-nickel. The only coins to have any silver during those years were half dollars, and they were debased to 40%.