I have the following cards:

Father&Son-Big Leaguers Reds Gus Bell/Buddy bell Cleveland indians Topps 1976

Indians Jim Hegan/Mike Hegan Milwaukee Topps 1976

Det Tigers Ray Boone/Bob Boone Phillies Topps 1976

I would like to know their worth $$

Unfortunately, they wouldn't be worth much. The maybe $2-$3 each if they are in mint condition.