Thinking about IC house laws, If the house is not in productive use, the octarchy will take it away, while giving nothing back to the guild, however, it is true, that it does not state, weather the house is still owned by the octarchy or not. Thus, players would assume, it is owned by their guild, and since there is no posted rule, anywhere, that they cant be sold, who's to stop you, if you all of a sudden, sold your guild keys to another guild? Who's to stop you, if you change the name of your guild, and hand leadership to another person? Who's to stop you.