No one else has said it so I will.
A loaner rifle (or couple/three). Just for those folks who are good enough friends to ask, but not good enough that you'd feel good letting them out of the house with one of your babies that you'd really not like to loan out. Sometimes a stopgap rifle will let you say yes and not having to worry about it, and keep em from pestering you into saying yes to one of your babies.
You can't have too many guns.
