I've become interested in online selling recently simply out of necessity, and it is how the world works now.
     I'll never be able to have a decent living situation unless I start bringing in some serious bank.
     Anyway, I have sold stuff as a result of facebook.  It happened just by accident of me just normally posting pictures of my art.
     Then I found it easy to do chat with my customers.  Also easy was them sending ,me money, and me sending them the art, keeping in communication throughout the whole process.
     It also worked good because it was through friends, and people I know.
     So, it is good to get to know people.  Who lnows?  They may buy your art.
     People who don't like me much never buy my art, haha.  I have found this to be pretty much true.

     In addition, I like to sell to people I know because at least the artwork 'stays in the family'.

     Some people won't buy from me unless they see my art looking cool in somebody's house.  Then they say, "Hey, I want some art, too!"
     Humans are just like that sometimes.