Well in Eberron there are savy Dwarf bankers.... Damn >_< now I want to DM a game in which a party after slaying a dragon they maketp their way to the hoard only to find a Magic Mouth spell which tells them:
"House Kundarac (?) thanks you for choosing us as your hoard guarding services, for more benefits please cast a sending spell to you neares House Kundarak outpost".