Huge inventory of authentic autographed sports and entertainment memorabilia and collectibles. Michael J Fox Back to Future Signed/Autographed Funko Pop #962 Beckett 164110. Offered is a Michael J Fox Back to the Future Signed/Autographed Funko Pop Figurine #962 Marty in Future Outfit. This figurine is authenticated by BAS/Beckett and includes their Tamper-proof Hologram Sticker. Questions about this item? We welcome any questions, concerns, or queries you may have. Best Authentics is a leading sports memorabilia and collectibles retailer located in South Central Pennsylvania. We have specialized in supplying quality authentic products to collectors for over 20 years and continue to update our inventory frequently with new and exciting items.