A good, unwarped Solex 4A1 would always be of value (to me, for instance). How about door windows/window motors? Anything there? Also front brake calipers if they're in good shape (but given what I know about corrosion in Minn, probably ANTHING exposed to the elements should be suspect!). A manual transmission will always be of interest to someone -- they're pretty hard to find. It's a popular engine so I'm sure someone would be interested (but the trick is to find a local buyer since you don't want to ship something that heavy across the country).
Also, if you have the original Becker radio people seem to really pay a lot for them (considering that they sound like crap). Instrument clusters seem to be popular.

Suggestion: go to eBay, search for "Mercedes 114" and you'll see what parts people are offering and buying for this car.

Why don't you give me a price (offline to catrinus1@netscape.net if you prefer) for the following:

Carb
Door window glass
window motors
Steering wheel if in good shape

Catrinus
73 280C