Interesting stuff. There's a lot to think about here...
I'm not too worried about selling any of my own art. I only do pastel paintings for my own personal fulfillment.
I did have a little exhibition once. I could have sold a couple of pieces but withdrew the whole lot from sale when a potential customer tried to haggle over prices that hardly even covered the cost of my materials:
smb's Blog > A Disastrous First Exhibition
In short, I have never ever sold a single painting - and I don't expect to, either. (Mind you, if I could sell just the one, then at least I could be in the "same boat" as Van Gogh!!) Haha!!
Interesting what you said about physical art galleries, though. On and off, over the last few years, I have been slowly building-up a small collection paintings by Filipino artists who's works I like. The intention was to have enough to be able to open a small art gallery when I retire... Well never mind, I can always make it more of a free coffee shop for socialites and other time-wasters!
There, is however a lot of scope for improving the online Store here at ArtFreaks.com. (You wouldn't even know there was one here unless you were looking for it. The current set-up is in a stand-alone part of the site and it is not integrated with the Forums...) The new set-up will be fully integrated with the Forums and, hopefully, it will allow all Full Members of the Forums to sell their art here.
That's a project for a later date though. Just watch this space!