Originally posted by jrcastillo selling your pictures in stock picture sites like fotolia.com among others
You can do quite well, although the good days are long gone. If you are looking to make gear money that is. Making a living at it is another story.
But shooting stock is not like shooting for fun. Each image must be technically perfect. it is a lot of work and then you sell images for maybe 25 cents each. So it is a numbers game. If you can build a good sized portfolio of over several thousand, technically perfect, creative, and in demand, images you will do fine.
Stock itself is not a monolith. There are a number of different markets. Fotolia is a micro-stock site, pricing is,well, micro. .27 cents for most sales. There are a number of such sites. Then you have "macro-stock" sites which are usually much harder to get accepted to but CAN have sales of up to $100 per image, though most sales will be far less than that. You also have the big agencies like Getty and Corbis but it is nearly impossible to get into those these days, at least as a hobbyist.
Taking a picture is about 10% of the actual work. You need to stage the image, hire models, get releases, keyword, title and caption and then upload. And don't even think about taking those 10,000 images on your hard drive and uploading, it won't work. If you want to shoot stock, you have to shoot for stock.