Mostly the legends from the 1950s, 1960s, and 1970s.
Topps, Bowman, Fleer, etc.
Rookie Cards
List of players is just an example, not limited to these names:
Baseball:
Mickey Mantle
Willie Mays
Pete Rose
Ted Williams
Hank Aaron
Ernie Banks
Yogi Berra
Babe Ruth
Lou Gehrig
Roberto Clemente
Sandy Koufax
Nolan Ryan
Jackie Robinson
Ed Mathews
Al Kaline
Football:
Jim Brown
Johnny Unitas
Bart Starr
Walter Payton
Dick Butkus
Basketball:
Wilt Chamberlain
Kareem Abdul Jabar
Lew Alcindor
Jerry West
Bill Russell
Oscar Robertson
Michael Jordan
Larry Bird
Magic Johnson
Julius Erving