Van Gogh's works are among the world's most expensive paintings. Those sold for over US$100 million (today's equivalent) include Portrait of Dr Gachet, Portrait of Joseph Roulin and Irises. The Metropolitan Museum of Art's version of Wheat Field with Cypresses was acquired in 1993 for US$57 million. In 2015 L'Allée des Alyscamps sold for US$66.3 million at Sotheby's, New York, exceeding its reserve of US$40 million.
Van Dyke left high school in 1944, his senior year, intending to join the United States Army Air Forces for pilot training during World War II. Denied enlistment several times for being underweight, he was eventually accepted for service as a radio announcer before transferring to the Special Services and entertaining troops in the continental United States. He received his high school diploma in 2004 at the age of 78.