A Mickey Mantle baseball card is now the most expensive piece of
REVEALED: The World's Most Expensive Sporting Memorabilia
Past Times Collectibles sells pieces of baseball history – Orange
The 10 most expensive sports collectibles
The 10 most expensive sports collectibles
The Most Expensive Sports Memorabilia Items - Loupe - Live Sports
How Sports Memorabilia Exploded Into a Billion-Dollar Business
14 Most Expensive Sports Memorabilia
Sports Memorabilia Auction
50 Most Valuable Baseball Cards of All Time
A Collector's Guide to Today's Top Baseball Memorabilia – Robb Report
Mantle Baseball Card Sells for Sports Memorabilia Record $12.6 Million