Our Guarantee

Our Guarantee is simple: If any item we sell is ever found to be of doubtful authenticity, we will issue an immediate and no-questions-asked refund. The excellent reputation of each supplier we do business with is the reason we stand behind every item we sell.  Nearly all items we sell can be validated online.

The reason I started Grand Slam Sports Memorabilia (GSSM) is because I collect sports memorabilia and wanted to make sure the autograph was authentic. Unfortunately with sports memorabilia there are a lot of unscrupulous people out there selling forged autographs, be assured that will never happen at GSSM.  

The value that I offer to you is simple: You will own authentic sports memorabilia at a reasonable price. The autographs are all authenticated by one of the four top authentication companies in the business PSA/DNA, James Spence Authentication, Beckett, and Schwartz Sports.

Your Satisfaction Is Our Goal