Michael Jordan's $500,000 Sneakers and More Insanely Expensive Sports Memorabilia
Rare Babe Ruth jersey sells for record $5.64 million – most-expensive sports memorabilia item ever - ABC News
Top 100 highlights of the 2021 auction year
Donors Seeking to Monetize Memorabilia Put Museums on Guard - The New York Times
Blue Jays Coach Returns 61st Home Run Ball to Aaron Judge - The New York Times