Wooden boxes and pelican/ABS cases are fine, but they can take up a lot of room when you have a handful of mics stacked on a shelf.
You could use an Electronic Dry Cabinet (like the Ruggard EDC-80L,) an electronically controlled dehumidifying system that minimizes moisture and protects sensitive electronic equipment from moisture, dust, dirt, and other calamities. You can put all sorts of jazz in them, including guns, microphones, cameras and lenses, moisture sensitive electronics, and so forth.
My wife sews thick, soft lint-free felt-like fabric tubes to protect my microphones, camera lenses, and other delicate equipment from scratches, dings, shock, etc.. when not in use. I store the sleeved gear in appropriate-size plastic storage tubs in a dry storage room, packing some items with silica gel desiccant.
Perhaps you could use something like this for your valuable mic collection. Maybe. James