Both the 1964 quarters with no mint mark and the 1964 D quarters are worth around $6 each in extremely fine condition. In uncirculated condition the value is around $9 for coins with an MS 60 grade. Uncirculated coins with a grade of MS 65 can sell for around $15.
How can you tell if a 1964 quarter is rare?
https://www.youtube.com/watch?v=fRnWzaI3nuo
What is the most valuable 1964 quarter?
Over 704 million 1964-D quarters produced, the highest one date, one mint total of the entire 1932-1964 Silver Washington series. A stunning example, gem quality 1964-D quarter was auctioned by DLRC Auctions $47.15.
How can you tell if a 1964 quarter is silver?
https://www.youtube.com/watch?v=jiqJocQKfz0
What is a 1964 all silver quarter worth?
Before 1965, US quarters were made of 90 percent silver. That means that due to the silver alone it would be worth about $3.50 (depending on silver prices). After 1964, the quarter is just made of nickel and copper and worth just 25 cents.