There is this website called istockphoto, over at www.istockphoto.com, which allows you to join their website for free and sells your photographs for you. You get paid in royalties and of course you pay them a small commission as well. I joined them recently and only after I had successfully registered, did I find out that my photographs are not good enough.
For the individuals that do not know, I usually take photographs of trees. Unfortunately my normal photos did not have the proper pixel count and I had to rely on other pictures. Anyway, it is a legitimate income and if you are looking for a way to get a few extra bucks, well you can try selling your photographs.
I am going to take a few new pictures to see if they are good enough. But with the website itself, I have not had any problems yet.