Now looked at a couple with what I've learned here on the forum.

Discovered that
a) I really just don't like the white ones.
b) quite how many have rust.
c) that the veggie conversions seem to be terrible things to engines.

So... There's this one back on ebay. 290K miles, but looks nice. http://cgi.ebay.com/ebaymotors/Mercedes-Benz-300-Series-1985-Mercedes-Benz-300TD-Wagon-/220723395552?pt=US_Cars_Trucks&hash=item336423bbe0#ht_10295wt_1103

Anyone else have a non-white one in the northeast?