This was sold as a cdv of John Heenan with a crappy camera phone picture, and went for under $100. The archaic copyright notice at the bottom caught my eye. I won it, did some research, and was able to determine it is one of the first commercially issued boxing cards. Issued pre-1870 by Charles DeForest Fredricks as part of his commercially produced "Specialite" series of famous people and sold through his gallery in New York City. His work is featured in a number of museum collections, including the Smithsonian.
This was a 'find': showed up at a local show:
I don't know that I'd call this a 'find' because it wasn't cheap but the Exhibit coupon on the back of the card together with the "Not to be used in exhibit machines" legend answered a significant question many Exhibit collectors had regarding the postcard backed cards from the 1920s:
