The price of a film adaptation of a short story depended on many factors, such as the popularity of the novel, the market demand for the film, the quality of the script, the budget of the film, and the production team. Normally, adapting a popular novel into a movie might earn a higher copyright fee. According to market research and data, the average copyright fee for adapting a novel into a movie could be between millions and tens of millions of dollars. However, this number could also change according to the demand of the film market. In addition to the copyright fee, there were also other fees to be paid for adapting the novel into a movie, such as production costs, publicity costs, music costs, special effects costs, and so on. The amount of these fees also depended on the budget of the movie and the size of the production team. The exact price of the copyright still needed to consider many factors, so there was no fixed answer. If you wish to adapt a novel into a movie, you are advised to consult a professional film adaptation team or copyright agent to determine the best price and plan.