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Jeff LichtmanAdam's point is well-taken. As an example, for the 55 Topps set, the rarest 8 for the longest time had been Art Fowler. The card had usually sold for about $1500 to $2000; suddenly the pop went up a bit and it is no longer the raretst 8. The price has since dropped to between $1000 to $1250. Who knows if a raw card was recently graded or perhaps someone was trying for a 9 and resubmitted?