@Haibane: I know that, which is why I'm asking if they are interested in my idea.  At the end of the day, each of the slaves in Emperium will go to thise respective agreed owners. I'm just thinking that the "shop assistants" will be something like advertised slaves, you know, walks around the store and catching the customer's attention. The customer than can ask for the manager which is Ryuuji and the two will strike an agreement to sell/buy the slave and voila