I think having the subject looking at the camera adds interest, but otherwise I feel this shot is a shot you took while walking by. There appears to be little post processing to enhance the main subject, which I take as the person holding the sign. There is a lot of distraction going on. Zoom in, crop, dodge and burn, do something to bring your subject as the main focal point so the viewer doesn't just wander through the shot.
You definitely caught a variety of looks in this one, and gotta say I don't think I've ever seen a yard sale with a drive-through. Has the feel of a drive by shooting, so to speak.