The 1971 Topps NFL Johnny Unitas is a prime example of how scarcity drives the sports card market and with only one PSA 10 that is known to exist.

The 1970 Topps NFL Bart Starr is a prime example of how scarcity drives the sports card market and with only 12 PSA 10s known to exist.

Starr joined Johnny Unitas and Sonny Jurgensen as the quarterbacks on the NFL’s All-1960s team and entered the Pro Football Hall of Fame in 1977 in his first year of eligibility.