Thank you, Federal Reserve. A signed rookie card of Dallas Mavericks star Luka Doncic sold for $4.6 million on Sunday, according to the Dallas Morning News. It is reportedly the highest price ever paid for a basketball card. Prices have been exploding but this one-of-a-kind card takes things to a new level. A signed Giannis Antetokounmpo rookie card sold for $1.812 million in September, and a LeBron James signed rookie card sold for $1.8 million in July. Tom Brady had a rookie card sold for almost $600,000 in January, and Los Angeles Angels star Mike Trout had one go for almost $4 million. Michael Jordan had a signed card from the 1992 All-Star Game go for $1.4 million earlier this month.