Collectors are scrambling for the only card to feature both NBA icons, with auctioneers confident it will break the $6 million mark.

The 2007-08 Upper Deck Exquisite Collection Dual Logoman Autographed card featuring Michael Jordan & Kobe Bryant has reached $5.37 million at a Heritage Auctions sale, putting it in range of becoming the most expensive card auction in history.

Basketball has made inroads with younger generations of collectors, with stars from the past 40 years becoming modern versions of what Babe Ruth and Mickey Mantle were before them.