There are 25 John Howard trading cards tracked on HobbyCardIndex, spanning UFC/MMA. The most valuable is the John Howard [Onyx] #146 at $11.72 raw.
Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/john-howardJohn Howard Cards
25 cards · UFC/MMA
All John Howard Cards
John Howard [Onyx] #146
$11.72
John Howard [Blue] #160
$3.42
John Howard [Black] #160
$3.41
John Howard [Black and White] #88
$3.00
John Howard [Purple] #160
$2.84
John Howard #102
$2.49
John Howard [Gold] #146
$2.49
John Howard [Gold] #102
$1.00
John Howard #23
$0.99
John Howard [Gold] #88
$0.50
John Howard #117
$0.25
John Howard #160
$0.25
John Howard [Silver] #160
$0.25
John Howard [Silver] #88
$0.25
John Howard #88
$0.25
John Howard [Green] #88
$0.25
John Howard [Green] #102
$0.25
John Howard [Gold] #23
$0.25
John Howard [Gold] #101
$0.25
John Howard #101
$0.25
John Howard [Silver] #102
$0.25
John Howard [Silver] #101
$0.25
John Howard [Silver] #117
$0.25
John Howard [Gold] #117
$0.25
John Howard #146
$0.25