How does the deactivate and sell features work?

How much money do we get for selling and where do we find others that are selling rooms?

Is there any money (in or out) involved in deactivating a room?

Theres no money deactivating the rooms, its like you are just holding the room so when the person leaves, then ppl can't have that room. But deactivating or selline doesnt cost money. Well, selling earns about half of what you paid to sell the room...