I will comment that I was under constant pressure to find safe haven (hiding places) for Mad Magazine. I was not under the same pressure with baseball and football cards and coins and stamps. We preserved them pretty well, by hiding the coins and because we had albums for them and the same for coins, and as for cards, by parking our bikes out of the rain so they wouldn't get wet in the wheel spokes, and by not flipping on wet areas. Nobody wanted to win a wet card on a flip. Some comics subjects were OK, but most were open targets for parents. Most of the kids hid them and a lot of the time met in the HUGE drainage tunnels under the streets, or in the catacombs overseas, or secluded spots in the school to read the comics and trade and pass them around. If it was on the average kids' mind to preserve them for 30/40/50 years, I didn't experience that. The only reason my coin and stamp "collection" was not thrown out, is because A) My parents knew it was money, B) My parents knew how hard I worked for the coin collecting/stamp collecting merit badge C) My brothers did not know where I hid the stamps and coins( in the heating ducts....some of which were in their rooms).
I did think of myself as a "collector", though, but I sure never thought about preservation, pristine or otherwise, for the future. neither did any of the other kids.
We could get some good wampum for Mad and Playboy, though.