On salted fish, basically everyone can be a seller. As long as you register on it and publish your second-hand goods, you will become a seller. If we are on the top, we will basically say hello to each other in the form of greetings. Are you there, or calling someone else's boss is ok. Inform the boss, boss, this can be cheaper, basically by address, there is no unified address.
Selling things on idle fish can be called merchants or individuals, some of which are hanged by individuals and some by merchants. Everyone should call the boss.