There seem to be more and more and more photo-related events going on, worldwide. 

"The Photo Art Fair is a four-day exhibition of carefully curated, collectable works from up to 50 international photographers. As a brand new show, the Photo Art Fair is designed to provide visitors with the unique opportunity to purchase collectable photographs direct from both undiscovered and emerging artists." It is taking place at London's Victoria House in Bloomsbury Square, from May 3-6, 2013, and will also feature panel discussions and all that stuff. There is a fee for becoming an "intelligent collector;" it's £7.50 in advance or a tenner at the door.