Ive been recently thinking more professionaly about my photography. I made a website: Mikhail Kofman Photography someone from an architecture design house took a look at my website, and really loved some of my architecture and landscape shots. they contacted me and said that they would possibly either buy some of my works and frame them or comission me to do a whole series. I'm really blown away i dont even know what to think. but my main question, if they want to buy specific pictures printed, i have no idea what to charge..... anyone here experienced with this also, my pictures are getting more and more attractive and im now thinking of the horror that is picture theft. whats stopping someone from saving an image that i put up on facebook, tumblr, or even this forum, and passing it off as their own or using it for commercial use? what can i do to secure my work and my self?