Street purchase example
When I was in Estelí I ran into the guy who is always selling linaza and manzanilla on the street. He knows me -- I have bought things from him for eight years. I figured I would buy a bag of linaza, so I asked the price.
He thought a bit (I knew that was bad news) and said "un US dolar". The current exchange rate is about C$23.5 to the dollar. I said "No soy Gringo" and waited. Another pause and then he said "C$20".
Good example of why it is a good idea to buy with cordobas.