An autographed Jessica Biel photo, authenticated, runs about $125 on the memorabilia market. Though a sought after actor, her popularity fluctuates with the quality of her films. Her better received films help drive her popularity up. Signed scenes from these movies bring the highest prices. It is important that the signature is authenticated, and a certificate of authenticity accompany the photo. This is protection for both the buyer and seller, an assurance that the photograph was signed by the artist herself, and is not a reproduction or a forgery.