Hello Salesman

"Hello Salesman!" Two Players

One player is a salesman, the Other Player is a series of customers.  They go door to door, but we pretend that part and just play however we are and do not need to use doors.  The game is played over multiple rounds.  Each round:

The Salesman says "Knock knock!"

The Other Player gets to choose one of four responses:
1.  "Hello Salesman!" says the Other Player and the Salesman has about ten seconds to say what single item they are selling and why the Other Player should buy it.  The Other Player counts down from ten on their fingers and can ask questions or even buy things but when the fingers are gone the door closes.  The Salesman can't sell the same thing twice and should tailor their sales to what they think the customers care about.  The Other Player is never the same customer twice.  This option cannot be used after options 3 or 4 have been used.

2.  "I won't answer the door" says the Other Player.  When they do this it's because they are concerned about something Big that makes them not open the door.  It should be generated by the World Building that inadvertently happens during a "Hello Salesman" round.  All future customers share this same concern though they won't come out and say it.  The Salesman may do nothing but move on to another door.  This option may not be used after option 4 has been used.

3.  "I can't answer the door" says the Other Player.  The Salesman may do nothing but move on to another door.

4.  No answer.  

The Other Player may leave the game at any time but the game doesn't end until the Salesman is done knocking on doors.