The Most In-Demand Investment Might Be Your Baseball Card Collection - WSJ
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In 2016 The Top 10 Most Valuable Sports Cards And Memorabilia Commanded A Record $12 Million+
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Mickey Mantle Card Sold for Sports Memorabilia Record $12.6 Million –
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T206 Wagner Sells for $6.6 Million, Reclaiming Title as Most Expensive Sports Card
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Most Expensive Sports Memorabilia
The most expensive sports memorabilia and collectibles in history - ESPN