Talking about the 1956 checklists reminded me of the 1963 Fleer checklist. I passed on a mint one for $40 back in the 1980's at one of the Nationals. I had paid that much for the rarest card in the set Joe Adcock! Couldn't see that for a checklist. Now it's the only card I need for the set, and I doubt I'll ever get it because I don't want to pay what they are asking for it. Sets are overrated!
