Some old comic books

A few days ago, I went into our garage to look for some old comic books, I found three. One is "Whisper" #1 by Capital Comics with a cover price of $1.75.The other 2 are "Mars" # 2 and 3 by First Comics with a cover price of $1.00. I was hoping to sell them but the comic book store in town will only buy comics with a cover price of $0.25 or less. I plan on keeping them safe until the comic book store will buy them.