I picked up a valuable photograph from a thrift store a couple of months ago, I have had the peice looked at to make sure it is real and now I want to sell it. It is an Olivia Parker photograph titled Moonsnails, it sells for $8000 in gallaries, but I am fully aware that I can't sell it for that much. How do I get it into an art auction or something? I tried EBay, that was a no go. Any help would be great