Um... actually putting some art out at a neighborhood yard sale isn't necessarily a bad idea.
Last year one of my neighbors stopped by at the neighborhood yard sale, discovered I do art, and recruited me for an art/charity event that she does -- a consignment boutique, which worked out very well for me. She also went to one of the art galleries I'm in, to see the art show. And I sold a small watercolor landscape to a different neighbor, who really likes it a lot. Some other people bought some cards. Someone else wanted a tattoo design... (who knew?) which I did for free on an index card, for fun...
It's a good thing if your neighbors know you're an artist, and actually see what you do, and get the idea that you have a real skill, and you're not just another hobbyist. Putting your art out for sale at a yard sale can be an easy way to introduce your art to neighbors & other people who aren't ordinarily art people.
Of course, if I do that, I know I'm going to get comments from non-art people that are mostly about them not being exposed to much art... but I'm okay with that.