Want to know a little bit about the industry in Singapore.. How do you, the seasoned amateur photographers, sell your pictures.. Is there some online sites, or pictures galleries who buy the pictures from amaterus/professional photgraphers.. Are there any specified formats - slides, negatives, digital pictures which is preferred by the buyers.

With so many online picture galleries available how do you manage to protect your copyrights and how do the buyes ensure that the picture is actually your own work.

Appreciate any feedback, suggestions..