Sure, you've seen hundreds, if not thousands of autographed Grand Slam Ventures cards before. But this is a card you almost surely have never seen. It can not be overstated how rare this is. Ray Floyd flat out refuses to sign these cards because of a dispute over money with the manufacturer. There can't be more than a handful known to exist. Simply put, nearly everyone needs this card to complete their collection.
Certificate of Authenticity from James Spence Authentication (JSA)