An unknown bidder paid a monster sum of money to own a small piece of Lebron James history. At an event yesterday put on by Goldin Auctions, a super rare Lebron James rookie card that the King himself signed, sold for a whopping $312,000 and easily surpassed the price paid for any other piece of Lebron memorabilia before.

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“This shows the worldwide appeal of basketball, of basketball cards, and of LeBron James,” Goldin said. “My office is going to be buried in emails and phone calls for the next two weeks with people wanting me to sell their LeBron card.”

While the card was expected to sell for a significant amount, nobody thought it would fetch that much money.

The final sale price blows away the previous record for a single, signed card, which was a 1933 autographed Babe Ruth card that sold for slightly more than $50,000. According to Darren Rovell of ESPN, it’s the third-highest price paid for a basketball card, surpassed only by a 1969 Lew Alcindor Topps rookie, which sold for $501,900, and a 1948 George Mikan rookie, which sold for $403,664.

Still, all of those cards have a ways to go before they can be the most valuable ever. At the same auction, the famous Honus Wagner baseball card from 1910, which is not signed, sold for a mindblowing $3.12 million dollars!

Check the gallery to see Lebron’s card.