Condition
Postcards in excellent condition are the most desirable. According to "The Postcard Price Guide," dirty, creased or worn postcards are valued mostly as placeholders in a collection until more desirable postcards with no defects come along.
Themes And Collections
Collectors avidly seek vintage Santa Claus, children, Halloween and postcards in a series. Highly desirable postcards also include collections built around themes, such as hometowns, African-American memorabilia, World War I, colleges and transportation. Libraries seek historic postcard collections.
Historical Connection
Vintage postcards captured scenes of family and town life, industrial progress and disasters. Collectors appreciate this connection to history and culture, according to a 2009 workshop at Brigham Young University presented by archivist and private postcard collector Jay Burrup.
Artist's Signature
Postcards that bear the initials or signature of the original artist are highly collectible. Highly sought-after works include those by Philip Boileau and Raphael Tuck.