My grandmother is getting rid of her very extensive National Geographic collection and I am the designated family member to find them a future home. She'll be tickled if she gets even a little money out of these. But I'd say for the ones pre-1946 a dollar would be great and after 1946 it starts more in the $0.25-0.50 range. She has tons more from after 1958 as well, so if you're looking for something specific let me know and I can probably find it for you. I am more than willing to ship them, the cost of which can be arranged later, but you can also pick them up if you're anywhere near the central VT/NH area. Thanks!
Here are the specific issues:
Year Month(s)
1917 April, June
1918 May
1920 May, December
1923 August, December
1924 January, February, May, June, September, October, December
1927 April, June, September. October, December
1928 November
1929 July, August, October
1931 June, February
1932 August, October, December
1934 October
1938 February
1943 June, October
1944 July (2), November
1946 January, May, October
1947 January, August, September
1948 January, April, May, June, July, August, September (2), November, December
1949 January, April, May, June, July, August, September, October, November,
December
1952 May, July, August, September, October
1953 February, May, July, October
1954 January, February
1955 February, June, November
1956 May, June
1958 October