Practically the same cost of ownership as a 500SEL without the extra power and rear legroom. Not much more powerful than a 300SD without the benefits of a Diesel engine. Middle child syndrome

There are no bad or less desireable W126s with the possible exception of single row timing chain versions of the M116/380 that haven't been converted to double row. Not an issue on an 85 380SE.

Sixto
91 300SE
87 300SDL