Plans to bring Tom Swift to television were apparently still under consideration in the early 1970s. At least two additional screenplays were written during that period. Ratings were unimpressive and plans for the series were cancelled. Harriet Stratemeyer Adams . I have been asked this question countless times and always welcome the opportunity to address it because I have seen a number of wildly varying estimates that I fear tend to misinform fledgling collectors and provide an over simplified answer.
Price is a factor of demand, availability, and condition.
The demand is remarkable. All of the books in the Tom Swift series are currently out of print and are not, therefore, readily available to collectors. The price of a Tom Swift title will vary based on the format it was released in. The first seventeen volumes were released with blue tweed bindings and full color dust jackets through 1961. These books are now thirty eight years old or better and are quite scarce.