Framed 'Indiana Jones and the Last Crusade' poster with various signatures

This item appears to be a framed movie poster for the 1989 film 'Indiana Jones and the Last Crusade'. The poster features the classic Drew Struzan-style artwork depicting Harrison Ford as Indiana Jones, Sean Connery as Professor Henry Jones, and other cast members including John Rhys-Davies, Denholm Elliott, Alison Doody, and Julian Glover. The poster bears several signatures in ink across the surface, including markings consistent with the signatures of Harrison Ford, Sean Connery, and Julian Glover, among others. The owner identifies this as a 27x40 inch poster with a Certificate of Authenticity (COA) signed by the full cast and crew; however, these user-supplied claims, including the authenticity of the signatures and the existence of a COA, are unverified without a physical inspection by a professional autograph authenticator. The poster is housed in a simple black frame and appears to be in good condition, though some light reflections on the protective glazing are visible. The colors remain vibrant with no obvious fading or significant tears visible in the provided image. Identification is based on visual examination of the film credits and stylistic features consistent with late 1980s theatrical promotional materials.

Based on the provided image, I am evaluating what appears to be a framed 27x40-inch theatrical movie poster for the 1989 film Indiana Jones and the Last Crusade. The owner identifies this as bearing signatures from the full cast and crew, including markings consistent with Harrison Ford and Sean Connery, and mentions a Certificate of Authenticity is present. Treating this attribution as a hypothesis, I cannot validate the signatures or the COA from a photograph. Physical inspection by a professional autograph expert is required. If the signatures are accurately attributed to the cast, comparable multi-signed entertainment memorabilia of this caliber typically commands high interest at auction, often selling in the $2,000 to $4,000 range depending on the clarity and placement of the signatures. However, if this piece is a reproduction, a printed replica of an autographed poster, or if the signatures cannot be validated by a recognized third-party expert, the value would drop significantly, likely reflecting the secondary market value of a decorative poster, typically $50 to $150. Visually, the poster presents well within its simple black frame, showing vibrant colors and no obvious major tearing, though I cannot examine the paper quality or the edges hidden beneath the frame. My valuation reflects the assumption that the user-supplied claims are accurate.