DA is more of social media site for artists, than a place to have a serious store. Just guessing, but they probably don't make the greatest selling features because the majority of users seem to be teens/twenty somethings that don't have a lot of money or people who're doing it as a hobby. I haven't looked too much into it, but isn't Fine Art America a decent place to sell art? And 500 px looks more professional a lot easier to use, but since you're a photographer, you probably already know about it. Or you could have your own website that your DA page could lead to and you won't have to deal with the hassle. I like DA for what it is, but I personally wouldn't try to use it to sell much of anything. Not by using the sites features, anyway. I mean, some people have done pretty well, but from what I've seen, it's usually through commission journals where someone usually just deals with the artists through private messaging, rather than buying through the website itself. It might be better just to kind of "advertise" on DA and do actual business, elsewhere.