Lou Gehrig's Final Home Jersey Sold for $2.7 Million

Lou Gehrig's jersey from Game 2 of the 1939 World Series, the final time he wore the pinstripes, was auctioned and sold for $2.712 million. This was the most a piece of Gehrig memorabilia has sold for. 

Gehrig would only play eight games during the 1939 season as he was diagnosed with ALS. What is the best piece of Yankees memorabilia you own?