Certainly, numerous paintings by famous artists have reached staggering prices at auctions or through private sales. Here are a few notable examples:

1. Leonardo da Vinci - "Salvator Mundi" (c. 1500): This painting, depicting Jesus Christ as the Savior of the World, is one of Leonardo da Vinci's most famous works. In 2017, it sold at auction for $450.3 million, making it the most expensive painting ever sold.
2. Pablo Picasso - "Les Femmes d'Alger (Version 'O')" (1955): Part of Picasso's "Women of Algiers" series, this painting sold for $179.4 million in 2015, setting a record for the most expensive artwork sold at auction at the time.
3. Vincent van Gogh - "Portrait of Dr. Gachet" (1890): This portrait of Dr. Paul Gachet, one of Van Gogh's final works before his death, sold for $82.5 million in 1990, becoming one of the most expensive paintings ever sold at the time.
4. Gustav Klimt - "Portrait of Adele Bloch-Bauer I" (1907): This iconic portrait, also known as "The Woman in Gold," was sold for $135 million in 2006, making it one of the most expensive paintings ever sold at the time.
5. Claude Monet - "Meules" (1890): One of Monet's famous haystack paintings, "Meules," sold for $110.7 million in 2019, setting a new auction record for the artist.
6. Jackson Pollock - "Number 17A" (1948): This abstract expressionist masterpiece by Pollock sold for $200 million in a private sale in 2015, making it one of the most expensive paintings ever sold.
7. Andy Warhol - "Silver Car Crash (Double Disaster)" (1963): This iconic work by Warhol, depicting a car crash, sold for $105 million in 2013, setting a new auction record for the artist.

These are just a few examples of some of the most valuable paintings by famous artists. The value of a painting can vary depending on factors such as its rarity, provenance, condition, and market demand.