a local yoga studio is going to be sponsoring me in the north beaches art walk this Thursday. I want to sell some photos but was just curious about prices... Most will be matted with a back.... 8x10s and 8x12s. a few won't have backs and a few won't be matted at all. what kind of prices would you recommend for these? I've never sold any prints before so I really don't know. I was thinking $30-$35 for the ones with backs and $20-$25 for everything else. I don't want to cheat myself...are those prices too low?