Any collectors of key pistols / jailer's keys / gun keys (whatever you want to call them),I'm guessing more likely in USA than over here. Have a few decorative non-firing repros somewhere, but can't remember seeing any on here.
One is small, solid bronze with what i think is referred to as a matchlock, the other 2 are larger iron or steel (with i presume/ think flintlock type mechs) with ornate brass and embellishments, but all are non-firing statics.