Mystery box of unopened hockey cards sells for over $5 million — and it may have several Gretzky rookie cards

Mystery box of unopened hockey cards sells for over $5 million — and it may have several Gretzky rookie cards
A Saskatchewan family is selling a case full of unopened 1979 hockey card boxes, and bidding has topped $1-million. The boxes contain an unknown number of Wayne Gretzky rookie cards like this one.