Do you use newsgroups a lot. I have followed some for years. People can get to it through their ISP and find a topic they are interested in.
People post messages through their email program.
Other users can read and even reply to those messages. Yes, I think there are some out there dealing with art works. I did look at one time. My friend sells them and I keep trying to get them to participate in some news groups to promote their Terry Redlin prints. They have the expertise to answer questions which is what works in news groups.