I have sold them right off my arm, as I am walking out of the grocery store. People have stopped me to ask if I sell them. I say, which color? They say which one they like, and I empty the contents into the other bags and sell it to them, on the spot, for about $15 (more or less.)
I seriously mean this. Make one in every color of the rainbow, and then, just use your bags. You won't use any one color bag more than twice before someone buys it off of you and you have to reknit one in that color. Once people see them in use, they want one.