it is hard to find people that have enough interest in bitcoin to upload pictures, and it's even harder to convince people that aren't familiar with bitcoin.
Ah, I so understand you! Every day we looking for new sellers, but conversion is really low. Note, that only best artists that I've found going to the contact shortly and ready for experiments. I'm so grateful to them.
I think that only time makes a best job for us, because we need a trust, experience and unfamiliar talents need more time to understand bitcoin philosophy. Understand that bitcoin is not only drugs and guns. It's may be independency and beauty.
You're right, it will take time, but we're here already and i really think this is just the beginning of a big improvement in our society, like it was for me when i first understand Bitcoin's nature.
You said you're looking for sellers every day, you run a gallery or something?