A man saw an advertisement in a paper which read, "Porsche for sale: 20 dollars."

He went to view it, expecting to find a battered heap of rust, but instead found himself face to face with a gleaming new model in mint condition.

"Why are you selling it for 20 dollars?" he asked the lady vendor.

"Simple," she replied, "Last week, my husband ran off with his secretary. Instead of coming back for the Porche, he said I should just sell it and send him the money."