I own 2 1960s classics that are worth far more than their MSRP. I believe you and I are outliers.I wonder how much of the “far better price” aspect was actually exchange rates. As I recall, at the time the DM was quite strong, driving the USD valuations crazy high.
I own two late w126 cars. See plenty on the road. Don’t see many early LS sedans. Dubious that any on the road would be as reliable, even with Mercedes’ mistake of making the 3.0L into a 3.5. The w140 was a different, complex beast. If Toyota was able to reverse engineer its kind of a cheat. My w140 was closing in on 300k when I sold it.
Lexus ate the MBZ and others lunch and changed the way they do business. That's history.