Gary Carter Autographed 1982 Donruss Diamond Kings Card - Montreal Expos. When you purchase something from us, it comes with our special Rackrs.com COA, and a full double back guarantee. If it doesn't pass authentication from either JSA or PSA, you get double your money back, plus the cost of the authentication. We take collecting very seriously. So you can trust our autographs are authentic. FREE SHIPPING.