The costs to update the interior (eg ~450 new seats, in-flight entertainment, carpets, catering) is around $30m which is the same price as a new Boeing 737 (seating ~160) in bulk orders.
This aircraft is also due maintenance on most of its engines, and almost certainly a heavy maintenance (D check) where the aircraft is almost completely taken apart, inspected, and reassembled. A ballpark for this is $10-$15 million, done every ~6 years, and often combined with a cabin refresh.
The original owner was looking at a ~$50+ million bill for maintenance, cabin refresh, ongoing crew training and equipment, maintenance crews and spares, paying for the larger gates at various airports etc. It wasn't worth it to them.
Wouldn't cost anything to maintain as a garden ornament though
Those HOA fines will add up.
https://www.ft.com/content/8d3c8121-5963-466c-96d8-7dda7e9ce...
Article title: The fake hitman, the crypto king and a wild revenge plan gone bad (Oct 2023)