1987 300E - Should I Buy ?

I have been looking at a 1987 300E. I currently have a 1980 300D and I know how exceptional these cars are, as I have 313k miles on it. I was basically wondering what inherent problems these models might have, and what the expected longevity might be.
The funny thing is that I probably already know what you guys are going to say, but I need the back-up. Especially when I say that I am considering it over a 1985 300SD with under 150k miles, but this is a clean CA car, and it has been baby’d all it’s life.
Any feed-back is well appreciated, so blast me ! LOL
Robert