After being away on business, Tim thought it would be nice to bring his wife a little gift. "How about some perfume?", he asked the cosmetics clerk. She showed him a bottle  costing $50.00.  

"That's a bit much," said Tim, so she returned with a smaller bottle for $30.00. "That's still quite a bit," Tim complained.  

Growing annoyed, the clerk brought out a tiny $15.00 bottle. "What I mean," said Tim, "is I'd like to see something really cheap."  

The clerk handed him a mirror.