I believe it was Dr Spo who recently wrote about the joys of a can of sardines. I thought I had a picture someplace. Here is a store that sold nothing but sardines of every imaginable variety and origin. It was in St-Malo on the coast of Brittany, not far from Mt St Michelle.
I was surprised by the ability of small shops focussing on just one thing, and doing it very well, to stay in business. I wonder if it is still there. We should move in across the street and open a shop that sells nothing by crackers.