83 240D $740

Spent a good while figuring out that the PO didn't have a clue about the vacuum routing for the transmission he had just put in. Which is why I got it cheap. Have spent about $500 on it so far - WVO kit (FPHE and Injector line heaters), tranny filter, fuel filters, etc. No major work except fixing up the vacuum, replacing the brake master cylinder, and refurbishing the front brake calipers.

92 300D 2.5 Turbo $3350

I think this was a deal. We didn't know what it was really worth when we bought it. Anyway, it runs great. Had a few minor issues which took a while to find - leak in vac modulator cap made the gears shift hard (which is I think why we got it cheap - hard shifts - PO thought tranny was going out). Also replaced 4 hydraulic lifters, although Mobil 1 syth oil had actually fixed the problem. But it was still clacking - turned out to be a bad injector nozzle. Also the Vacuum transducer went out and the turbo stopped. But I swapped it with the EGR transducer and works fine now. I figure I can live without EGR.
Gets 35 mpg average. Love it.