List prices on super high end homes are often a fantasy (or what Jonathan Miller describes as "Aspirational Pricing")

1. Alex Khadavi listed Palazzo di Vista (777 Sarbonne) for $87.77 million but it sold for $46.76 million at auction (53% of list price)
2. Asher Gala listed for his Wallingford Estate for $135 million. It eventually sold for 60,850,000 to Jennifer Lopez & Ben Affleck (45% of the list price).
3. The 30 acre hill top property Stella Nova was listed for $59 million in 2019. After 4 price drops it sold for $20.6 million (per Zillow - only 35% of the list price).
4. Villa Firenze was listed at $165 million but sold for $51 million (31% of the original price) (recent $79 million relisting).
5. Nile Niami originally hoped to sell "The One" for $500 million (video tour), but the unfinished property ended up at auction and despite drawing five bidders sold for "only" $141 million net of fees (against debt of $256 million). The buyer was self-made bllionaire Richard Saghian (paying only 28% of the original ask price).
6. The Mountain was originally marketed for $1 billion (Jeff Hyland declined to take the listing at that price) Despite a supposed bid of $400 million and rumored interest from the likes of Tom Cruise and Jeff Bezos, it failed to draw a buyer willing to take on the debt (reportedly ~$200 million) and reverted back to the Mark Hughes Trust. Vanity Fair's August 2022 article is a fascinating read of the long history.
7. Mohammed Hadid has had many successes (like selling "Le Belvedere" for $56 Million) and struggles and had plans to develop multiple NFPs near Franklin Canyon, including one advertised for $250 million, and another for nine figures (more recent news and Scott Edward updates in December 2022). See also Hadid's booms and busts from TheRealDeal.
8. Don Abbey reportedly purchased the entire 22 acre Shelter Island in Montana (near Glacier National Park) for $1.76 million in 2000. After beginning construction it ran into cost overruns and lawsuits then took a decade to complete. Abbey listed it for $78 million, then $59 million, then $29 million. Then a $13.95 million price brought more attention, but it still took three years to sell in 2018 (the price was undisclosed). The state tax board apparently ruled that the property was worth $41.8 million in 2015 though Abbey claimed the island’s taxable worth was far less at $9.8 million (he may have been right). The 2014 tax bill for the property was $367,696. You can watch video of the property, which includes a helipad for year-round access.
9. CNBC highlighted three mega-mansions with some of the largest price drops in luxury real estate in 2019.

Beverly Hills Sale-to-List price tends to average 95% or more, but at the top end of the market that's often not the case. 25 Most Expensive Listings Worldwide per Robbreport are recent listings that may or not sell for much lower than the original list prices.