[font color=\'#000000\']Always nice to hear that someone's selling prints. The 'norm' is that you sign on the bottom right, and I put a comma after my name, followed by the year the image was made. The title goes on the left, followed by edition info (3/20, for example). I do this in pencil, small and just dark enough to be legible, but not distracting from the print. Pencil is also good from an archival standpoint. I also mat with white space around all sides of the image, a bit more at the bottom.
On the back of the print, again in pencil, I write the same information but add some things. After my name, I put my city, should anyone want to track me down after a generation or so. I put the place the photograph was made (just city, state, or city, country). I put the paper and the inkset used to make that print, and I put the month and year the print was made, all for conservation information, should it ever come to that. 6 lines, in all. But then, I don't do editions of 200.
You will want to select a hardness of pencil that does not require you to bear down at all on the paper, which would leave an impression on the front. Some trial and error will be necessary. For my particular paper, I use a 4B for the front and a 6B for the back. God only knows if any of my photographs are worth all this trouble, but there you have it.[/font]