Early 1980's. There was a monthly price guide that competed with Beckett (until Beckett sued them) that was really promoting rookie cards and hyping them by putting a "RC" after the players name. There was not really that much real time market information available back then, so the kind of made up the prices, but it really advanced the rookie card market by bringing in the investors. Pretty much any card with an "RC" would bring a premium. SCD was filled with ads of dealers selling the rookie card in lots of 25, 50, 100 for the investors.
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