Support! I am one of those people that don't know what things are from the words haha however to fit with the theme I have two ideas: There could be like a "yard sale" type space for furni or items you're trying to sell Or since not everyone will be selling it could be a "display" section where you could show off items. However furni in this section wouldn't make sense. People could use a display spot for items they are selling or just items they are proud of getting or think are cute or whatever. It could be like on old MySpace picking your top ten friends that displayed on your page.
Omg yes! I'm so sick of having to type stuff out on my wall then retype when something has sold. The lack of organisation drives me bonkers!!