I have a Nikco Sports KGJ ball, complete with case and certificate of authenticity (#1921 of 5000 produced) It' came out in 2000, is in excellent condition, and is listed as his "Welcome to the Reds" ball. I know many of you are aficionados and collector of such things and was just wondering if this is at all valuable or something I should hang onto and let the grandkids hang it around in the backyard...thanks for any advice you can offer.