Like anything else, scarcity is your friend.
1st, you have to create a name for yourself. I remember going through the Met in NYC with Digital Artist Laurence Gartel a while back and if one thing was apparent, to me at least, the last of art in today's culture is staggering. You had all the contemporary and modern art like the Jackson Pollock splatter or white on white polar bear in a snow storm, then you go in to the earlier exhibits and was amazed... a piece of armor with 10,000 fleur de lis, gorgeous carved chest, even the silverware was ornate... My general impression was not only the craftsmanship, but the beauty in even the most utilitarian things. As well as there was a TON of crap. Some of the exhibits were things that I could easily do, as well as I remember one paper mache statue that looked like a bad art project out of 4th grade... The most basic truth when it comes to today's art... you need a patron. A patron needs to like you, like your work and have money. The museums for the most part are whores and while some pieces are true classic, a great many are ghastly, and there because a patron paid for it to be there. Money talks. If you have to lose all dignity and bruise your knees, then by all means, degrade yourself in the deepest levels, get that wealthy patron, and you too can be in a museum.
Now that you have your "name" you start creating limited editions. Whether it is digital or film, you state how many prints of what size your will produce and that is the limit.
Here is an example of the drivel many espouse:
To focus on flow, you must shift the emphasis of your thought processes. Pollock reveals the artistic process as the essence of creation, not the product, or finished painting. Process is action, and product is passive. Looking at a painting close up, this is what you see in Pollock, the creative process captured, still alive with movement, texture, and color. You are not looking at a painting, you are looking at painting.
In the end, it is the PERCEPTION of your work that creates value... Nothing more... nothing less.
If you want it... Really really want it... Degrade yourself... degrade yourself to the lowest levels and you will find someone who will pimp and whore your out and create a name for you. It is a self-fulfilling prophecy perhaps as well. In the end you might become the angst-ridden tortured artist who actual produces something worthwhile.
Cindy Sherman's untitled 153 and untitled 96 are MEH in my eyes, but there is $6.6 million dollars of sales between the two of them that would disagree.
As far as Gursky? I think the Windows XP background was more interesting.
Art is after all in the eye of the beholder.