I have my brother’s football cards somewhere, the only one I remember is Bart Starr?
Cards like that (Bart Starr, etc...) may not fetch too much money unless they are “Rookie Cards” or there’s some other interesting story to them, but I have taken similar cards of some Hall of Famers (Bart Starr, Johnny Unitas, Sonny Jurgenson, etc...) that I have and then I go find a Sports Illustrated cover (or some other magazine) with said Hall of Famer and get a little creative with the matting and frame them together for the man cave. They make for a good conversation piece and it’s better than leaving them in a box in a storage closet. I’ve even sold a few. :-)