Hi! Was not sure where to post this.. I need some help please. I got a Flickr mail from someone that wants to purchase a photo from me and asks what the charge is. I googled the person and it seems like he works for some consulting group. I would like to sell the photo, but I have no idea what to charge, or how, have never sold a photo before. I many of you photographers here sells images all the time, what should I reply? Thanks for all help!