There are 16 John Marks trading cards tracked on HobbyCardIndex, spanning Hockey. The most valuable is the John Marks #50 at $2.30 raw.
Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/john-marksJohn Marks Cards
16 cards · Hockey
All John Marks Cards
John Marks #50
$2.30
John Marks [Gold] #50
$2.11
John Marks [Bronze] #50
$1.99
John Marks #282
$1.77
John Marks #194
$1.75
John Marks #16
$1.56
John Marks #16
$1.51
John Marks #194
$1.49
John Marks #114
$1.47
John Marks #47
$1.39
John Marks #121
$1.31
John Marks #157
$1.25
John Marks #70
$1.24
John Marks #47
$1.05
John Marks #157
$0.99
John Marks #121
$0.76