James Dean Collectible Phone Cards

A mint set of collectible James Dean phone cards, each featuring a classic photo by Roy Schatt. These cards were produced by HT Technologies. I got these cards quite a number of years ago, dont know if they are worth collecting. Anybody can advise? To be honest, I don't know much about James Dean. I know he is an American actor who made the hugely popular movie Rebel Without a Cause back in the 1950s. He died in a car crash at an early age at the height of his acting career and achieved legendary status. If you have watched any of his movies, comments are much apreciated. Thank you.