How much is this worth?

How much is a signed baseball by the New York Mets world series champion 1969 team? This includes players Nolan Ryan, Tom Seaver, Tommie Agee, Jerry Koosman, Buddy Harrelson, Ed Kranepool, Ron Swoboda, and much more. Im a Yankees fan and I have no interested in this ball anymore and I want to sell. If you are interested in this please email me at nysportsfan08@aol.com.