While the cash value of the gift is understandably drawing attention...there have been some other similar donations that also had "nothing to sneeze at" amounts, that also ended up in presidential libraries afterward.
Some examples:
During the Truman, Eisenhower, and Nixon administrations, Middle Eastern leaders like the Shah of Iran and Saudi royalty gifted jewel-encrusted swords, daggers, and valuable artworks, some worth millions of dollars. Many ended up in presidential libraries or museums.
A rare valuable historical coin collection from Ethiopia’s Emperor Haile Selassie to President Kennedy, which became part of the Kennedy Center.
The Saudi's gave several pieces of jewelry to Pat Nixon to wear to special events, etc... and became part of museums later.
A rare collection of Medieval armor was presented to President Lyndon B. Johnson by the King of Spain in the 1960s — currently housed in the LBJ Presidential Library.
(in fact, LBJ had quite the colllection of gifts that ended up in his presidential library)
The Lyndon B. Johnson Presidential Library houses over 2,000 head-of-state gifts presented to President and Mrs. Johnson during his presidency. These items include ceremonial swords from Morocco and Saudi Arabia, Chinse tomb sculptures from the Tang Dynasty, an alabaster funerary vase from Egypt, and other finely crafted objects from around the world.
While the exact total value of these gifts isn't publicly disclosed, their historical and cultural significance is considerable. The collection also features a diverse array of artifacts, such as Middle Eastern antiquities, coins, postage stamps, Oval Office furniture, and artwork by renowned artists like Frederic Remington, Charles Russell, Winslow Homer, and Diego Rivera