During the time I collected BB cards and traded then between friends, the most rarest card that I encountered was a
Bob Rogers (LA Angeles catcher) 1962 rookie card.
This was the card (I'll never forget it):
View attachment 52118
One guy in our group had one, and would not trade or sell it for anything (believe me, we tried). I never saw another Bob Rogers card. Ralph G. was the envy of the group. He had something the rest of us wanted, but couldn't have/get. We all prided ourselves with our collection, as most collectors do. At the time, I would have given a testicle for that card.

It shows you how times have changed.
How many of you still have some your old baseball cards? I still have a few mine.

I don't care how many times I clean out the garage, THEY STAY!!! They have no value to anyone but me. My wife would throw them out if I let her.

I still have a lot of my old Archie, Batman, Iron man and Mad magazines as well that I'm saving them to pass along to my grand kids after I transition. They have absolutely no concept of the possible monetary value of those collectibles, or the emotional attachment I have to them.
I told them to sell them for whatever they can get for them. Regardless of the direction I'll go once I leave here, I won't need them where I'm going.

Some of those cards, comics and magazines are from the 1950's.