BigStockPhoto

BigStockPhoto sells most photos on their site for $1-$2, and you receive 50% of this as your commission. They also offer a "Special Licensing" feature which allows you to choose from a number of different licensing options. The customer is given more flexibility in how they can use your photo, and you are paid much more than for a standard photo. In order to apply, BigStockPhoto provides a short tutorial on what kind of photos they can accept, and then you must answer a few questions based on the tutorial.