Prefer a drop down menu then to use checkbox.
Also it'll be better if it's just next to the quick search box.

okay.. since this is a feedback thread. i would like to post my view.

for garage sale.. why dun just add sub-forums for Selling, Buying, Inquiring respectively? this will greatly maintain the consistency of the whole marketplace section,while getting the noobs to post their items in the correct place.

just a question, is there a need to add this tagging feature in? (unless it allows user to filter these 'tag' when the user doing a search.. otherwise i see no picture adding it)

anywya.. i'm just voicing my very 2cents... no offence ok