Those are amazing! Treasure them!

My grandparents used to have several complete sets of a few very famous comic series from the 60-70's that belonged to my uncle, and some loose numbers that were even older than that. I used to read them even when I was in high school in the 90's.

All it took was a few years of neglect as they got older and the comics were put away in a big box to lose them all to mold and insects.