Well as we have had a few complaints as late about the amount of traffic in the classifieds section I have added a user option to exclude classifieds posts from What's New, should you wish.
To do so go to Settings -> General Settings
And under Thread Display Options you can check Exclude Classifieds from What's New Tab then click the Save button at the bottom of the page.
It might take a couple of page refreshes to take effect. Now when you click the What's New tab classifieds posts will not be included.
Note: this only effects the orange What's New Tab. The New Posts link will always include all posts.
If you miss a bargain you do so at your own peril!