Autograph Value Calculator

While no calculator can give a perfect value for every autograph, comparing sold prices, condition and documentation gives you a range you can explain. This worksheet walks through that comparison. It is not a formal appraisal and it does not use a formula from an appraisal firm.

What to compare

There is no single formula that turns a signature into a price. Start with recent sold listings for the same signer on a similar item. Then note whether your piece is the same kind of object, whether it has a third-party cert you can look up, and what condition the signature and the object are in. A photo, a baseball and a game-used jersey are not the same market.

Step-by-Step Estimation

Step 1: Find several recent sold listings of the same signer on a similar item. Step 2: Write down those prices, and set aside listings for a different object or a cert you cannot look up. Step 3: Note whether your item is more or less like those sales: official item or replica, inscription, damage, and documentation. Step 4: If you cannot find close sales, say the range is unknown instead of inventing a midpoint. This worksheet is not a certified appraisal.