Who can you contact to authenticate and value autographed Mets baseballs?

Answer 1

An autograph that is not authenticated by a creditable company could sell at half the price or less than one that is. Two of the top, and most trusted authenticators are PSA/DNA, and James Spence Authentic (JSA). Collectors will pay more for signatures authenticated by either one.

It may sound odd but in some cases PSA/DNA, and JSA authenticated signatures may sell higher than a Letter of authenticity from an unknown or less trusted authenticator that witnessed the signing even though PSA/DNA, and JSA did not. It's just a matter of collectors trust, and collectors will pay more for it.

Check the respective websites Show Schedule to see if they will be in the area that you live. They also do business through the mail. If you did not get the signatures signed yourself, before spending money on having the autograph authenticated do your homework. Find signatures on line that have been properly authenticated, and compare them to yours. If you feel comfortable that they can be authentic then proceed.

I will leave a link below for a price guide for New York Mets Team Signed Baseballs along with a link to the Authenticators mentioned above.