1. Scott thought that he could sell his collection of comic books to make some extra money, but then he learned that everybody else already had the same comic books. His collection wasn’t worth a dime
2. Police caught the diamond thief when he tried to sell a fake diamond. It was not worth a dime

Synonyms: not worth a dime , not worth a hill of beans , not worth the paper it’s printed on , not worth a plugged nickel. This expression is always used in the negative.