There are 6 Marty trading cards tracked on HobbyCardIndex, spanning Baseball, Amiibo. The most valuable is the Marty #S2 [Animal Crossing Sanrio] at $4.00 raw.

Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/marty

Marty Cards

Name: Marty Card Price Index — Historical Data
Creator: HobbyCardIndex
License: https://hobbycardindex.com/legal/terms

6 cards · Baseball Amiibo

All Marty Cards

Marty Cards

All Marty Cards

Marty #S2 [Animal Crossing Sanrio]

Marty #68TDC-31

Marty #NNO

Marty #35

Marty #40

Marty #37

Track Marty Cards