I have always struggled with this since I was an undergraduate. Photographs are worth less than other forms of art because they can be duplicated over and over again. With a painting, or a drawing, there is and will forever be, only one original.
So, What if there was only one photograph? A photographic edition of one and that lucky owner also gets the negative (Yes negatives, I still shoot them). Crazy? Maybe.
I think I am going to do just that. A set of 25-50 images that I will print myself. Most likely in platinum or another hand made process and there will only be one of each.