I currently own 2 1982 team sign baseballs with Mcgwire sig on both balls.I do have a coa from psa/dna.Can any one tell me the value of these baseballs?One autograph is on the sweet spot and the other one is on the side panel of the ball.

Also I am looking to buy a 98 game sign bat.Please post or email meThanks.
Carlie Medina III