Consider any photograph taken by a professional photographer.
That photographer will have bought their camera, lenses, flashes, batteries and memory cards (likely to be £4000+), travelled somewhere to take the photo (thereby incurring travelling expenses), then the photo is likely to have been processed in some way on a computer; that computer will need to have been purchased, as will all of the software that runs on it. For professional photographers, there will be the additional cost of premises, advertising, marketing, trade shows, public liability and indemnity insurance, and then there might be staff to pay, and hopefully, somewhere down the line, the photographer will have enough money to pay themselves as well!
Of course, a professional photographer is taking many thousands of photographs every year, so you could argue that this cost can be divided down to a 'per-photograph'.
The internet has devalued photography to a degree, as a great deal of photography is stolen, coupled with customers who don't understand how time-consuming it can be to create great photography.
My belief is that art is something that inspires and enlightens us, and should be free to view wherever possible, but must be purchased if someone wishes to own or use it.
Article by Mark (Photography) / 10th February 2012