While we're on the topic of Signals you send your customers, here are few more to think about...
The weeds growing in the bushes next to your store. Gee, they must not be into taking care of their environment. I wonder what else they don't take care of.
The old, faded, peeling window clings from companies you no longer carry. Gee, I guess they don't have any of the new stuff I just saw online.
The sloppy, unorganized displays with no rhyme, reason, or order. Gee, I hope I don't have to ask them to find something. That could take all day.
The gum-chewing sales clerk leaning over the counter. Gee, I hope I don't have to ask her any questions. I doubt she knows anything.
The misspelled signs. Gee, doesn't anyone proofread anymore. They certainly aren't the brightest bulbs in the socket.
Everything you do (or don't do) sends a signal, one way or another. Make sure you are sending out the right message.
PS The best signal is one that is consistent with your Character Diamond. When you make sure that every single signal matches your Core Values, magic is bound to happen.