A typewriter is heavy and dusty. An early computer is often only a shell once the rechargeable battery has leaked. In the overview Security for collectors you take the batteries out before you put the machine on the shelf.
Storage
Dry, dust cover, nothing stacked on the keyboard, no batteries in the compartment. Drives and tapes are a climate of their own, cool and dry, and a copy of the data somewhere else if the data are the value. The housing alone is then only the housing.
When someone comes
Heavy, rarely the first target, but a small rare machine is easy. It does not stand by the door. The number and the proof are on the list. Cipher machines have their own text, because law and history sit closer there: Cipher machines.