I had the pleasure of shopping at Hula/Lily's (don't remember which host had this) Yard Sale several times. Once you entered the room you formed a line and went through the Epcot Turnstile which was never released. You paid 25 credits then told Lily which item you would like to buy. The good stuff was usually hidden very well. She would not let you randomly say I want to buy the red crate. You had to actually tell her the exact location of the item. Like I said the good stuff was very very well hidden! I really liked this event
Sorry I have no screen shots. Maybe you can check the Wiki.