I’m sure any fire alarm collector has something similar, a box of non-working devices. These are mine that I’ve gotten from upgrades in the last few months.
Simplex 4251-20 (Cracked plastic)
Wheelock 7002T-24 (Weak strobe, only flashes once every five seconds)
Wheelock 7002T-12 (Completely dead, also my first alarm)
Spectralert Classic (Broken mounting tab)
Chemetron 601 (Missing cover)
System Sensor 5603 (Activated)
FCI SBS-1201 (Broken head cage)
I also have 12 Space Age AV-32 light plates that had the grills cut out.