I brought an 85 wagon in a little worst conditon a couple years ago for under 1K. Drove it home and it had sat for 3 years full of water. No rust but it did stink.

Even my low milage 300D had a funk from the years and years it was used so little.

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On the hunt...
1985 300D----Sold
1985 300TD---Sold
1983 300SD---Sold