Topps NFL Sonny Jurgensen is a prime example of how scarcity drives the sports card market and with only 3 PSA 10s known to exist.

RELATED: 1970 Topps NFL Sonny Jurgensen PSA 10: A Near Impossible Vintage Find Dec 5, 1971; Baltimore, MD, USA; FILE PHOTO; Baltimore Colts quarterback Johnny Unitas (19) in action against the ...