I have an artist that wants to use our retail store as his gallery and have us represent him as to what I would call his agent. He is extremely talented and widely versed in many different types of art. He is trying to get exposure and needs financial backing as well as business and marketing expertise. We can do that but we don’t come from the art world. How can I find out what is the best selling art to produce so I can guide him in building a body of work over time that sells and has value? Thanks