What are your plans for the car? If AC is a must, I'd hold out for a car with working AC, or something that costs less to accommodate a Sanden retrofit.

https://washingtondc.craigslist.org/mld/cto/d/mercedes-benz-300sd/6338870968.html

https://huntsville.craigslist.org/cto/d/79-mercedes-benz-300sd/6300072206.html

Sixto
98 E320s sedan and wagon