The National Archives eStore
http://estore.archives.gov/
This site contains videos, books, posters, collectalbes and also a section for archivists, called Be Your Own Archivist.
http://estore.archives.gov/category.aspx?categoryID=27
Today I purchased the following:
World War II on Film: A Catalog of Select Motion Pictures in the National Archives
and
The Sounds of History: World War 2 -
Side One
American Radio Mobilizes the Homefront
Montage of WAR BOND and POPULAR SONGS
Excerpts of Speeches
News Reports
Side Two
Allied Turncoats Broadcast for The Axis Powers
Excerpts from wartime shortwave
propaganda
The Sounds of History is on cassette tape, so I will have to have it converted, but for $6.95 who can complain?