There is an international Latin and Ballroom dancing competition near where I live. I have had agreement from the organisers to take photographs. I have never undertaken dance photography before. I have a couple of questions. Having checked on Alamy these type of images do not seem to sell well, if at all, so the first question: is it worth my time (although I am assuming the experience will be worth it). Second, the lighting in the hall is poor and flash is not allowed. My camera (a Nikon D5) is good at low light but some noise is inevitable; does this mean that I will not be able to use them for stock in any case?