I know I will pay more for a photo that can be linked to a specific event or time, like a wire photo with the paper attached that shows exactly when and why it was made, or a photographer signed or stamped photo. For example, this photo of Battling Siki is a nice image but what caught my interest is that it is a wire photo reporting his murder in NYC in 1925:
This one is ink-signed and stamped by Jim Jeffries' official photographer:
This Jeffries is hand-copyrighted (1906) by the photographer:
And this Jeffries is embossed with the Dana Studio stamp:
