As a person that buys artful things and sells them. I try to remember – We like to see the actual item we are getting. Art should be well represented even if you have made 20 or 30 of the same style really it is nice to see the real item. There is nothing worse than buying what is considered to be original one of a kind and getting it in the mail only to find it was less than represented or even slightly different than the photo. Be considerate to your art buying customers and take the time to rephotograph similar items. In all fairness somethings less original have no need to be rephotographed.
All I know is the items I make tend to be a little more subject to what the heat will do so each item will truly be unique so I want them to be represented properly.
I have made over 25 of these ocean scenes within the past year and I made sure each one was photographed no matter how close it may have been to the last one I sold. It is just fair to my customers.