CHICAGO (CBS) — Leslie Hindman’s auction house in Chicago will sell what could be the only signed photograph of outlaw Jesse James.

The photo of James as a young man will be auctioned April 5. The auction house expects to fetch more than $30,000 for the rare print.

“He left few artifacts behind to help fill in the gaps,” Hindman said in an e-mail. That mystery “has in return intensified the demand for all James-related historical memorabilia, especially photographs and signed documents.”