There are 11 that I know of listed below. Mintage must not be huge as these are rarely seen for sale or trade. As for value, I don't know what would be fair for the buyer and seller. I will look to see what I may have extra of. Do you have anything besides another Chumash for possible trade ?
1998 Geronimo, Cochise, Crazy Horse
1999 Sitting Bull, Chief Joseph, Tecumseh
2000 Red Cloud, Black Hawk, Pontiac
2001 Woman and Child
2002 Spotted Eagle
Can you please post or send me a picture front and back side of your Geronimo. I don't even have a picture of that one.