There are 18 Man-o'-War trading cards tracked on HobbyCardIndex, spanning Magic: The Gathering. The most valuable is the Man-o'-War at $14.14 raw.
Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/man-o-warMan-o'-War Cards
18 cards · Magic: The Gathering
All Man-o'-War Cards
Man-o'-War
$14.14
Man-o'-War
$1.73
Man-o'-War [Foil]
$0.85
Man-o'-War
$0.74
Man-o'-War
$0.40
Man-o'-War [A25] #64
$0.39
Man-o'-War [Foil]
$0.34
Man-o'-War
$0.31
Man-o'-War [Foil]
$0.28
Man-o'-War #38
$0.23
Man-o'-War
$0.20
Man-o'-War
$0.19
Man-o'-War #58
$0.15
Man-o'-War
$0.13
Man-o'-War
$0.13
Man-o'-War [VIS]
$0.10
Man-o'-War
$0.09
Man-o'-War [POR]
$0.08