You indicate that you have about 100 coins from 1964 and earlier. If you are looking at melt value only, check coinflation.com. If you are considering possible errors and varieties, better quality images would be in order.
Asking for only Hunstman and Enamel on an open forum? If you want their opinion only, perhaps PMs would be better.
so my opinion would be only a fool would sell 90% HIGH GRADE coins for melt. I still get buyers at $4.50 and higher for XF or better. year, MM & condition will be the value level. if you have a coin a buyer NEEDS then throw away the "book" value
Check all 1956-P through 1964-P Washington Quarters to see if they have Type "B" Reverses. The Type "B" Reverse Varieties were struck with Proof Reverse Dies. Coins struck with Proof Reverse Dies have a separation between the "E" and "S" in STATES while those struck with normal Business Strike Dies have the "E" and "S" in STATES touching. The Type "B" Reverse coins fetch a significant premium over face or Silver value. There were also 1964-D Washington Quarters struck with a Type "C" Reverse. The Type "C" Reverse Dies were produced for the 1965 production year, they are slightly different than previous year's Dies and may have been used in 1964 at the Denver Mint by accident or possibly to finish production quotas. No one seems to know the true answer to the question! There are also a smorgasbord of Doubled Die Varieties to look for as well.
As was said, there is melt value and there is collector value. Higher graded coins have more value than melt. Post a pic of each one and we can attempt to grade them.
totally agree with Huntsman & ENAMEL. PCGSphotogradeonline.com is a great grading resource. y'all gonna need a loupe with 20X minimum. check each coin for errors & varieties. if you put 40 of those in a roll and take $10 for 'em----we will find you >>>>------- and beat you senseless . you be sittin' on some serious money----- or cash--------------- which is just as good as money
Icetek: when reading your original post, it struck me if you were asking if they had any SILVER value, never was mentioned if they had collection value. Be a little bit CLEARER in your post next time. YES, coins are in Ext Fine+ condition, and worth more than melt value. Nice finds.