When I did that art show a few weeks ago, I wished I had some small, quickly produced art to sell, or even give away. These are appropriate business cards for me.
These are pretty ephemeral things, I can't imagine asking more than $5 for them. $2 or $3 might be more like it, or nothing. But let me know if one of them makes you laugh. I'm trying to do one every day until these (many) scraps I have are used up. They are treated with spray fixative, so the pencil marks won't just wipe off if they get handled.