There are 1 John Gardner trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the John Gardner #101 at $0.99 raw.

Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/john-gardner

John Gardner Cards

Name: John Gardner Card Price Index — Historical Data
Creator: HobbyCardIndex
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1 cards · Baseball

All John Gardner Cards