aside from the yellow mark, this nickel is about the same condition as my 1987 but just a little bit more worn.
1940 is a very common date for a Jefferson and even in that condition it's not worth more than a dime. That series has a number of key and semi key dates, but the 1940 is usually a spender unless it is AU or above.
Meh I still like it haha I keep all the older dates no matter what condition but I usually leave the 1964s unless they look as good as this or better. lol I don't have much in my collection or at least I don't think i do
Nice, if you don't have one already may I suggest buying Jefferson nickel folders. The series can be completed solely out of circulation and roll hunting with a good amount of luck, and if you complete the majority of it and want to buy the rest to complete the set the key coins are very affordable. It's a great starter set if you're new to the coin collecting world and have an interest in 20th century US coins.
