In general, an authentic, hand-signed photo of Elvis Presley from the 1950s could be worth anywhere from several thousand dollars to hundreds of thousands of dollars. The most valuable photos are those that feature Elvis in his early years, when he was still relatively unknown. Photos that show him in iconic poses or with other famous people from the era can also command a higher price.
The condition of the photo is also important. A photo that is in good condition, with no tears or blemishes, will be more valuable than a damaged photo. The same is true for the signature. A clear, bold signature is more valuable than a faint or smudged signature.
The provenance of the item is also important. If the photo comes with a certificate of authenticity from a reputable source, that will add to its value.
Overall, an autographed photo of Elvis Presley from the 1950s can be a very valuable collectible. The value of such an item depends on a number of factors, but it could be worth anywhere from several thousand dollars to hundreds of thousands of dollars.