I sold two photos in the past week. When I took up documentary photography several years ago, I did so without a thought that anyone would purchase my work. But, evidently, people need photos. They search for images online and make offers.
I've sold a few of my photos posted in the blog but most sales come from the photo website, flickr, which is odd because I made my images non-searchable through google. I guess people just comb flickr for photos that meet their needs. Most of the sales are for magazines, but I've sold a few for advertising and two for book covers, though one of the latter was an old family photo I own rather than my own work.
I haven't been taking photos seriously for about two years. I got too busy with other things and my desire to do so has waned. I still snap shots with my phone, but I'm committed to cheap androids, so the photo quality isn't good. I also take phone shots as I come upon things I want to show someone. My camera photos in the past were planned to varying extents. That approach typically produces better results, at least for me.
While I am taken by documentary images in and of themselves, my drive to shoot these photos is best characterized by the 1995 film "Smoke," from director Wayne Wang, starring William Hurt and Harvey Keitel. The drive has been largely 'satisfied,' so I don't expect I'll go back to shooting photos in a big way, but I may occasionally dabble. By the way, if you haven't seen Smoke, it's a great film