How much is a baseball autographed by Grover Cleveland Alexander worth or where can one find out?

Answer 1

Authenticity and condition are the key factors in determining value of any signed item. Alexander's genuine signature on a Baseball is difficult to find, and as such, your ball could be worth as much as $2500 depending on these and other variables, such as type of ball, additional signatures on the ball, date signed, and possibly - the provenance, meaning the detailed history of this signed ball: who, what, when, where, etc.