My rule of thumb for increasing prices, was for every 3-5 sessions I booked at my current price, I would increase my rate by $50. For example, my first 3-5 families I charged them $100 each for their photo session. Then, when I received an inquiry for another family session, I increased my rate to $150.
What Sells Best On Shutterstock?
Some types of photos that sell best are Portrait Photography, Food Photography, Landscapes (usually with people) and fine art photography (artsy).