So they flip it around and give me a flyer listing all of my neighbors that they work with. This is what we call “implied” word of mouth. It isn’t the same as a direct endorsement, but it gives the same feeling. It lets the buyer think “all these people are using it, it must be OK.”
You can use this technique in lots of ways: A “customer favorites” shelf, a “most popular” list, or anything that shows that lots of customers are happy.