In short, yes, they are worth at least the silver melt value which currently is about $3 each. The coins are not particularly rare, and Washington Quarters can be difficult to sell to collectors.
Washington Quarters had a mini-bubble in the early years of this century when the State Quarters series caused collectors to take a look at the whole series. That bubble hasn't so much burst as sprung a leak. These dates are not so rare in this condition. As mint state coins, they might have been serious pieces. That 1940 (with apparently the D mint mark) is one of the better pieces of this lot. I am quite proud of the 1940-D piece I acquired in high mint state condition. I am just a few coins short of finishing the set, but all mine are mint state or will be once I replace those lesser ones. This set seems to be a "One a Year" set, which can be okay, but the true test is finding the earlier D and some S mint examples in pristine condition. It seems every year had a common one, usually the unmintmarked ones from Philadelphia. Oh, when I say I have it almost complete, I don't stop at 1964. Complete means complete, to date, all proofs included, all mint-issued alloys. All in higher grades like MS/PF 65 and up. No aftermarket plating or washes.