T206 Honus Wagner baseball card sells for record $6.6 million

"This Wagner stands out because of its condition," said Brian Dwyer, president of Robert Edward Auctions, which brokered the deal ,per ESPN. "There's only about 60 of these that we can confirm through various population reports and available grading data. Of those 60, most are rated poor, authentic or good, at best. This card is one of the best examples out there, and it's certainly one of the best examples available."

This particular Wagner card received a grade of 3 from Sportscard Guaranty Corp. (SGC). Only four T206 Wagner cards have been graded higher than a 3, combined, all in private collections, ESPN reports. 

A 1952 Mickey Mantle card that sold for $5.2 million in January previously held the record for the highest-selling sports card of all time. That record was later matched by a 2003-04 Upper Deck Exquisite Collection LeBron James-autographed rookie jersey card in April.

Another Wagner card set a record when it sold for more than $3.75 million in May, making it the sixth-most expensive card of all time at the time. Now four Wagner cards are currently in the top 10 of the highest-selling cards of all time, each selling for more than $3 million.