a little clarification........."most popular" most "coveted"
either owning a piece, or not, just most popular which would lead to collecting
your personal feelings of who is the most popular/collected/ desired players to own a piece of something
a quick example:
Ruth
Mantle
Cobb
Mays
Anson
Wagner
Robinson
Johnson
Gehrig
Young
Jeter
Aaron
past and present
up to 20 players
etc etc