I really like Christine's ideas - those are smart ideas for your shop.
I think this is a hard market to break into because there isn't really a large fan base of it that I know of so that just means it would be harder to find, not that it's not there. Maybe there is a different way to appeal to your audience. Do you know what kind of audience you are tailored to? Age range, profession, style etc? Where and how do you see these pieces being used? Can they be ordered with frames? Have you thought of making T-shirt prints out of them?
I would change your descriptions a bit. As a potential buyer, I want to know what inspired the piece, what it means to you as the artist, what you are trying to say, what year you got the pictures from, how well they will stay together (varnish on top?), what the title is of each piece, if they are signed by you the artist - lots of details I would like to know.
Anyway, those are my thoughts.