A rookie card that could go for more than $1 million just got pulled. So does the global sports trading card market. A 1-of-1 Flagg rookie card was pulled in Rhode Island, per ESPN, after the team offered a bounty for it. The sports trading card market has boomed since the COVID pandemic began. Article Continues Below“The current high paid for any Flagg card is $366,000 in a March auction,” ESPN added.