Suspension level valves. 1 rear 1 front about 500 each
Main pressure valve that sets on top of reservoir. the one with the disc that is cable operated from the cabin for locking suspension. Worth about a grand if you can find one new.
Pressure sensor connected to 5th sphere in driver's front wheel well. Contains switch to instrument light indicating suspension lock or low pressure.
Of course the struts. The pump from pressurizing the fluid that runs off the engine. It's worth about 700 or so.
The nitrogen spheres if not already trashed would be nice.

Just about anything else is garden variety 450 SEL
Warm up regulator and fuel distributor might be M-100 specific

Windshield washer tank is really rare

Probably something else I am forgetting