Vince, I get where you are coming from in the way of the sales area being a little more serious than Comics General.
But many deal with each other regularly, and try to enjoy the engagements while also considering their next book to purchase. And like this weekend where some sellers were posting fantastic books, many regular buyers were not online, so then people were asking "Are my prices too high or are these not collectible anymore." I'd post a quick note in their thread it was all good, and I thought their prices were spot-on.
I think the level of fun interaction is a good thing to keep everyone coming back. When it gets too much in a sales thread, though, I can see where it could be confusing for people joining the thread late and wondering what is left.