Here's one that seems comparable and has a few needs: https://bringatrailer.com/listing/1973-mercedes-benz-450sl-78/

There have been a few low mile ones in the 20k-high 30k range. Condition is everything. I have my sights on a early R107 when I get things together.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT