There are some very large desks manufactured over time. It is hard to compare those desks based on price as there are big differences in time between them.
The Focusrite Forte
was a very expensive desk. But brought Focusrite fame and fortune.
SSL has delivered big big desks to many studios.
AMS Neve did the same.
But in the day Philips and Sony made their own large format consoles based on being a "in house" affair.
Such big big rooms are one offs and rare. But everytime a new city gets the olympic plays another of those big desks is ordered.
But nowadays it often is a Studer Vista or alike. Many many channels, but a (relatively) small desk with severall layers.