Paintings. I'd love to have something unique, interesting and beautiful hanging on my rented walls. But the prices tend to be from 200eur upwards for A3 size ink work, decent paintings are probably more. I could justify a threefold price compared to a photo of same size, but not tenfold. I think the industry of painting art should change somehow. Devianart's order prints is going to the right direction, but they are still overpriced. PS. Started thinking painting as a service business and I think the most potential is at bathroom wall paintings. If you think about it, many people go approximately once per day to sit in bathroom for about 10 minutes. That's a long time to look at empty wall. And that's probably only time during the whole day they just look at an empty wall. And the scene of bathroom wall paintings is dominated by silly one liners in frames or something printed to toilet paper.