Today's world artists have moved from local fairs, farmer's markets and galleries to sell the products online. It can be difficult because they must compete with companies that product these productions by the tens of thousands for cheap. Yet them are making a dent on Ebay, Etsy, and even Amazon.
The process isn't exactly the same as for large producers. They must try and niche out their products so that it attracts a community of followers. Facebook and other social media make this more possible. Once they have the followers they can update them when new productions come out. For Amazon they may want to put it on a product like a coffee mug or T-shirt. There are restrictions on art products unless invited.
That doesn't mean good old fashion face-to-face techniques don't work. As a matter of fact, they are often more effective because people will purchase these products right away. When something moves their emotions they simply just go and buy it on the spot. There could be a lot of unsuccessful sales as well.
This artistic production is of flowers in Belize. It comes in two sizes 8.5"X11" and 16"X20" making it possible to use in an office or on a wall. It reminds people of sailing in the Caribbean. It was actually taken while diving off of the coral reefs. There is a spot that boats come to see the sharks and throw chum overboard to attract them.