I still have some lol inherited them
A friend of mine had them as a kid and then lost them when he moved out of his parents' home.
About three years ago, his mom passed and she was still staying in the same house he had grown up in.
He proceeded to clean up everything in it so he and his siblings could sell it. In particular, he made a thorough clean up of his childhood bedroom, where he found a barely perceptiple slit in the wall. He ripped it open and there were all his cards from the early 70s, in pristine condition.
He had done such a good job of hiding them as a kid that he had completely forgotten that he had done that.