I just uncovered a really nice Fleetwood Album that is entitled Proof Card Society of the United States. I googled it and only came up with a supplier in Acworth, GA. This is part of the huge stamp collection that I have been selling off, for my son-in-law, since last summer. I was quite disappointed in the value of the many first day covers that are part of this collection but these look to be of a little different side road to FDCs. There are about 50 of these cards in the binder. Have they taken the same road in value as FDCs or have they retained a better percentage of the initial cost. Could someone please advise value? They are varied from 1979 to 1990 with no particular topic or subject that I could ascertain. Thanks always for your valued input. Paul
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