Sign? I didn't see any sign!

This is the side entrance to the market where I took the "Treasures..." photo posted April 29th. Aside from the obvious "No dogs allowed," this sign reads "No selling of old things," which is exactly what the men on the other side of the fence are doing, laying their wares out on newspaper or just on the stones. In this way they avoid paying a fee for a real stand, like the one where my treasures were offered for sale, but they risk a fine if the inspectors come along.