Due to the high value of silver, silver quarters from 1964 and before cost $2.45 up, while rare dates, mint marks, and varieties escalate values even more. 1930's Washington quarters deliver $10. Standing Liberty quarters can go for $20 or $30, with those in great condition demanding $50 up. Barber series with "Fine" condition are normally $25 up. Older Seated Liberty and Bust Quarters go for $20 up. Rare dates and great condition coins are much-sought-after, reaching thousands of dollars at auctions.