This looks like a fair price if the reflectors are good - https://sacramento.craigslist.org/pts/d/mercedes-euro-headlights-w114/6330976261.html . Not mine, no stake in sale.

I can't imagine a good set of DOT sealed beams housings, doors and trim will cost less unless they come on a parts car.

Check hemmings.com and talk to Tom Walgamuth (username t walgamuth) on the Diesel forum about restoring reflectors.

Sixto
98 E320s sedan and wagon