We've added a new Private/Business designation to each classified ad. A couple weeks ago we added a new field when posting ads for sale. That new field asks if the ad is a private or a business listing.
This week we launched a new search feature which allows you to limit results to private, business, or both types of ads. The new feature defaults to all ads.
We've also added a small designation to the bottom of each classified ad indicating if it is listed by a business or a private party.