Old National Geographic Maps

[Motep]

I found a rusted metal box in my basement, which is filled to the brim with national geographic maps from the forties, fifties, sixties and seventies. I was wondering that one of you might be able to tell me if any are of value. I havent been searching long, but I could probably use some help.

Also, there was a small box in there that contained little nat geo booklets from the 40's-50's about countries that do not exist anymore...