The website of the Ephemera Society of America discusses the newly active American poster market, resurgent in the past ten years. The number of poster auctions conducted in the United States increased from two in 1990 to at least eight in 2002. There are now vintage poster fairs in several major U.S. cities, and collectors worldwide are seeing new value in American creations in this category, especially American posters produced between the two World Wars. World War pieces, such as Norman Rockwell’s patriotic World War II quartet shown in my mom’s poster retrospective at Savannah’s Telfair Museum in 2002, The Four Freedoms, fetches over $3,000. Read more here.