Long-unseen works by Van Gogh, Cezanne, Monet estimated at $450 million before auction ↧ ↧ Long-unseen works by Van Gogh, Cezanne, Monet estimated at $450 mil... A collection of 12 ​long-unseen paintings, including works by Vincent van Gogh, Paul Cezanne and Claude Monet, is expected to ‌fetch around $450 million when it goes on sale in New York in November.