The 87 300TD is a good car. If you can find a good example, I would get it, unless you are willing to go to a 2005/6 CDI.
I live in the midwest, and every single 210 i looked at had rust. They may be an option down south, but not worth considering in the rust belt.
The 211 seems much better protected from corrosion. It is just a bonus to get the mileage, power, and safety features.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes