There are 2 Long Gone trading cards tracked on HobbyCardIndex, spanning Baseball. The most valuable is the Long Gone #32 at $1.21 raw.

Source: HobbyCardIndex · Updated daily · https://hobbycardindex.com/players/long-gone

Long Gone Cards

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

2 cards · Baseball

All Long Gone Cards