If any area needs cleaned up in this section...IMO...is a consistant method of contacting the seller of intent to purchase the item.
Sometimes it says email me..sometimes pm me...sometimes don't pm me..sometimes only post here.
I've seen more problems over someone thinking they were in on an item only to find out a deal had been worked out via back door channels.
IMO..if it's listed here then the first one to post that they want the item should get it. But that's just me.