Let's say you have a portfolio of 50 strong images - artistic landscapes, wildlife, etc - and you have them up on several POD (print on demand) sites ... how often do you sell the same image (different sizes or medium perhaps)?
I've learned my craft shooting events (bike races, running races, triathlons, etc) but now I am thinking that I have one image, that one person MAYBE interested in. Nobody else will want to buy it. However, if I shift my focus to other subjects (wildlife, landscapes), now I have one image that MORE than one person might be interested in. However, in real life, how often do you get repeat sales? I know it depends on how strong of an image you can create, but I'd like to hear some input. Anyone? 
I had it on my wall and a friend gave me cash on the spot to take it home with him, and two others from people seeing it on FB.

