I rent space at a local gallery and I've sold a few prints from there. In my limited experience, I've found that people are more interested in my prints of things in and around Virginia, so I can relate to Bill's comment about his best images are made in his backyard.
I'm an unknown as far as me being a photographer so I still have to deal with the "who is this guy and why should I buy one of his prints" question but I firmly believe that if you price your work too cheaply you won't be taken seriously. For that reason I studied other photographers' prices and priced mine accordingly. I do not price my prints as high as the well-known photographers in my area, but I certainly don't price them at the bottom either. In addition to my prints, I believe my time and efforts are worth something.
my 2 cents