So you want to buy a photograph. Here's question 3 in the series of 5 blog posts on what to ask before buying a photograph.
Question 3. What is the edition size?
From the 1980's onwards photographs began to be commonly printed in limited editions. An edition size of 10, for example means that only 10 prints of that image have been made through that print process at that scale - one might find other editions of the same image, but in different dimensions r made using another process. All editions should be numbered. A print from a small edition size is more exclusive and therefore more valuable. Signed prints tend to be more expensive and therefore more valuable. Signed prints tend to be more expensive than unsigned.