It's California. Everything has a premium in CA.
https://ventura.craigslist.org/cto/d/mercedes-300-sdl/6674103318.html
I like the SDL, but frankly, it's more car than I need. Nobody ever sits in the back.
A W123 actually handles even better in congested LA traffic. The tightness in this super city caused by over-population, definitely favors the smallest turning radii, back up handling etc.
W126 S-Class are the better cruisers, no doubt.
Being able to stretch arms and legs during hour long freeway parking lot sessions, is vital.
Plus, they are smog excempt.