I know I'm going to sound like a dick for saying so, but I personally don't think your art is at a point yet where you're going to get many buyers for your DA prints. If any at all. It's something we all aspire to but few ever manage to achieve. Those who do reach that level of quality are generally the kind of people who've had to sacrifice quite a bit, be it social life or health or money on art supplies or what-have-you, to get their art to a point of quality where people feel it's worth spending money on.
I get the feeling your style is still all over the place and you haven't really found a comfortable zone for yourself, but I guess it's the kind of thing that only starts to settle once you really start drawing on a frequent and almost instinctive basis.
All the same, Godspeed. Don't let my snide comment drag you down, it's mostly meant to rile you up and have you prove me wrong. We probably wish we all had that kind of motivation.