Stock Photography is a great way for photographers to gain exposure as well make money at the same time. However all stock photos want sell my guess for you all is to find a good market and take stockphotos based inside that area. Try doing different themes like holidays for instance. I will give you a pointer on websites like istockphoto, fotolia, shutterstock, you will see a section that says best seller images allot of those images are business images and mainly the area most photographers try to sale their photos in. A few years ago they may had of sold however today its going to just be another photo sitting on their website that prolly want even get 1 view. Not becuse it's an ugly image but that market is to over populated with photographer trying to sale photos to so my advice would be to find a different market to sale to.
Photographer Casey Diggs http://www.ctdgraphicx.com/photography.html