This doesn’t work, does it?

The OED offers ‘inestimable’ which works pretty well here.

Emendation No. 2: it’s the previously untold story, since David Robson (the bylined hack) has already been told it and is now passing it on to us hapless readers, assuming, that is, that we have been so improvident as to penetrate the paywall of the Barclay Twins’ esteemed organ.

Tim’s point will fail if the collection cannot find a buyer, of course. Personally I would pay £5 never to have heard of any of the Rockefellers, the Club of Rome, etc., etc.

The real “untold story” is that rich families can only remain rich as long as they are fairly well disciplined. Money is divided in each generation and if you produce too many Paris Hiltons, well she may have restored her fortune one way or the other but her family will clearly be dirt poor in another generation or two.

The temptation for worthless offspring to spend all their family’s money is often too great.

So this is the Art collection of David R. Grandson of John D. Who has had an admirable life in many ways for a member of the idle rich. And he has done the world a service by marrying a good wife and having six children. The children are largely worthless though which is a bit of a poor reflection on the man:

David Rockefeller Jr. (born July 24, 1941)[8] – vice chairman, Rockefeller Family & Associates (the family office, Room 5600); chairman of Rockefeller Financial Services; Trustee of the Rockefeller Foundation; former chairman of the Rockefeller Brothers Fund and Rockefeller & Co., Inc., among many other family institutions.
Abigail Aldrich “Abby” Rockefeller (born 1943) – economist and feminist. Eldest and most rebellious daughter, she was drawn to Marxism and was an ardent admirer of Fidel Castro and a late 1960s/early 1970s radical feminist[47] who belonged to the organization Female Liberation, later forming a splinter group called Cell 16.[48] An environmentalist and ecologist, she was an active supporter of the women’s liberation movement.
Neva Rockefeller (born 1944[8]) – economist and philanthropist. She is director of the Global Development and Environment Institute; trustee and vice chair of the Rockefeller Brothers Fund and Director of the Rockefeller Philanthropy Advisors.
Margaret Dulany “Peggy” Rockefeller (born 1947)[8] – founder of the Synergos Institute in 1986; Board member of the Council on Foreign Relations; serves on the Advisory Committee of the David Rockefeller Center for Latin American Studies at Harvard University.
Richard Gilder Rockefeller (1949–2014)[49] – physician and philanthropist; chairman of the United States advisory board of the international aid group Doctors Without Borders; trustee and chair of the Rockefeller Brothers Fund.
Eileen Rockefeller (born 1952)[8] – venture philanthropist; Founding Chair of Rockefeller Philanthropy Advisors, established in New York City in 2002.

But I do agree with one thing – his art collection is priceless:

Another major source of asset wealth was his art collection, ranging from impressionist to postmodern, which he developed through the influence upon him of his mother Abby and her establishment, with two associates, of the Museum of Modern Art in New York City in 1929.

Impressionist to post-modern? You don’t say. In the sense that it is worthless anyway.

So, SMFS, if someone offered you Two Women Chatting by the Sea or Dance at Bougival, you’d sniff disdainfully and say, “fie to your Impressionist daubs!” Me, I’m wondering how many fingers I’d be willing to cut off if that were the price. Over/under is three, and a thumb.