AI Appraisal Estimate

This item is a San Francisco 49ers Riddell Speed Mini Helmet from the modern Slate Collection, featuring a distinct matte charcoal or gunmetal grey finish. It is significantly smaller than a full-sized helmet, typically measuring approximately 5 inches in height and 6 inches in length, constructed from molded plastic with a gold-painted PVC face mask. The helmet includes an authentic San Francisco 49ers 'SF' logo on the side with a metallic gold and red color scheme that complements the matte finish. A signature by running back Isaac Guerendo is clearly visible on the top-left crown, inscribed with 'Guerendo #31' in a silver/white paint pen. This autograph is notable for its clarity and the inclusion of the player's jersey number. The item is currently housed in its original clear plastic clam-shell packaging, which shows 'Slate Collection' and 'NFL Mini Helmet' branding by Riddell. Notable features include the white chin strap and an official NFL holographic security sticker on the lower portion of the shell to ensure authenticity. The condition appears to be 'new in box' (NIB), with no visible scuffs, chips, or fading to the matte paint or the autograph. As a modern collectible, likely produced in the 2024 season, it represents a high-quality piece of sports memorabilia geared toward fans and collectors of NFL rookie talent.

I have examined the provided images of the Isaac Guerendo autographed Riddell Speed Slate Collection mini helmet. The item appears in 'New In Box' condition, with the matte charcoal finish and metallic logo decals showing no visible degradation. The signature, executed in silver paint pen, is crisp and includes the '#31' jersey number inscription, which adds a premium over a standard signature. The presence of the official NFL holographic security sticker is a strong indicator of legitimacy. As a 2024 rookie running back for the San Francisco 49ers, Guerendo's market value is currently driven by high-upside potential and the significant demand for 49ers memorabilia. Comparable mini helmets for mid-round rookies in specialty finishes typically trade within the $90-$160 range depending on the visibility of the autograph. The 'Slate' series is a popular modern aesthetic that often commands a 15-20% premium over standard retail mini helmets. However, a definitive appraisal is limited by the digital format; I cannot verify the physical depth of the ink or the chemical composition of the hologram to rule out high-quality reproductions. A full authentication would require a hands-on inspection by a third-party service such as PSA/DNA, JSA, or Beckett to provide a certificate of authenticity (COA). Any subsequent injury or change in Guerendo's depth chart status will significantly impact future volatility. At present, this remains an excellent entry-level investment piece for NFL collectors.