with the price of silver, I think most common dates and low grade coins will be worth just melt. Coins like Barbers (dimes, quarters and halves) that used to have a small premium over melt will no longer have that premium as melt value has exceeded that
if silver goes up in value so should the value of those coins. A 100 year old silver quarter should still have a premium over its silver value.
Most dates of barber quarters seem to have a mintage of less than a couple million, most of the washington silver quarters have mintages of about 20 million or higher. The average barber quarter could be considered a key date compared to those produced later on.
Even in a low grade, an older coin with a mintage 10-50 times less than another should be worth more even if its just a couple dollars.
a worn 1911 s barber quarter (mintage of 988 thousand) should be worth more than a worn 1964 D Washington quarter (mintage over 704 million). the 1911 s barber quarter is worth 11 dollars in good condition (making it about 5-6 dollars in about good condition) which is only about a dollar more than any other silver quarter would cost. With rising silver prices, the values of all barber quarters have to go up.