Well sort of.
Previously leased to Macmillan Publishers for the last 60 years, the building has been sitting vacant since 2019 and supposedly needs something like $100 million in CapEx to make it leasable again. Four of the five current owners have wanted to renovate it, but the fifth kept blocking it, and so the other partners sued for a "partition auction."
That auction happened last week, and even though the four owners were really trying to lock down the 25% share that they didn't own, the auction was won by an outsider at $190 million. That said, a 10% deposit was to be due the following day and, apparently, that never happened. So maybe it hasn't sold yet. But whatever, it's still interesting to think about its purchase price.
According to Wikipedia, the Flatiron Building is 255,000 square feet. So at $190 million, the building was "purchased" for $745 per foot. Assuming that it needs another $100 million, that's another $392 psf, for a total of $1,137 psf.