There are 14 Mark Dewey trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the Mark Dewey [Press Proof] #129 at $2.73 raw.
Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/mark-deweyMark Dewey Cards
14 cards · Baseball
All Mark Dewey Cards
Mark Dewey [Press Proof] #129
$2.73
Mark Dewey #584
$1.69
Mark Dewey #24
$1.62
Mark Dewey #U172
$1.59
Mark Dewey #468
$1.58
Mark Dewey #371
$1.49
Mark Dewey #129
$1.32
Mark Dewey #101
$1.31
Mark Dewey #378
$1.19
Mark Dewey #102
$1.14
Mark Dewey #101
$1.00
Mark Dewey #477
$0.99
Mark Dewey #82
$0.99
Mark Dewey #216
$0.25