Market

"Three for a pound!" the man behind the stall enthused.
There was nothing in front of him though. In fact his entire stall was empty.
People milled about and looked at him as if he were mad.
"What about you, madam? Can you resist this once-in-a-lifetime offer?"
The woman he was addressing stepped over to the stall.
"What are you selling?"
"What am I selling?" He laughed. "All of this." He swept a hand over the empty table.
"I think I'll pass," she said.
"Your loss."
As the woman walked away the man continued to yell of great deals on nothing.