Art To Pay For Illustration

I'm currently amassing pictures to sell to help finance my comic book work. Which is odd and backwards but everyone's got funny twists in their careers. Above is a teeny ink and watercolour on handmade paper. It's about five inches by three and a half. I'm thinking of ding a bunch of these and selling them. They are so much fun to do. I love monsters. Also, I've started a series of pencil drawings to sell. These will be mid sized detailed pieces. Work I love doing. Has anyone tried this? Any advice, thoughts?