there is no record of Oprah Winfrey selling a Gustav Klimt painting for $150 million. It's possible that this event occurred after i lost interest in that topic or that it was a hypothetical scenario or a rumor. If it did happen, I would not have access to that specific information. Please note that financial transactions and personal details of individuals can change over time, so it's always a good idea to refer to the latest news sources or reputable websites for the most accurate and up-to-date information.