Desmond has been a fan of Crispin's paintings for years and is thrilled when the artist promises to give him painting lessons. The two agree that Crispin will provide Desmond with five weekly lessons for $1,000 each, payable once the lessons are complete. After teaching Desmond two lessons, Crispin dies of a heart attack. Crispin's estate sues Desmond for the $5,000 payment for the art lessons. What result?