The cards are from Trump Taj Mahal and Trump Plaza in Atlantic City, New Jersey, and they were used in 1990 when the New York Yankees legend was 59 years old. Mantle died in 1995 at the age of 63.
The cards are in "near mint" condition, and one has an autograph rated as a nine out of 10. They could reportedly sell for about $2,000 at Robert Edwards Auctions. Bids are already over $1,000.
Considering Mantle's American Express card went for $8,400 at auction, per TMZ, the price of the casino cards has the potential to rise even more before bidding ends.