Here's some screenshots of the bazaar features integrated to our social platform:

After an ad is listed it shows up on the global "activity" list:

Then viewing an ad (while logged in), you're shown your relationship to the seller. Personally, I think the "sales feedback" metric while helpful, isn't quite as revealing as knowing whether you and the seller have "mutual friends." 

Your profile page also contains listings of your ads. Friends and visitors who view your profile will immediately know what you're selling.

We've also built hooks into Facebook such that if you sign-in or associate your Facebook account as a new user or existing user--

posting an ad will also update your Facebook status page:

And finally, since we're not out to build a site that relies on classified ad revenue, you can be assured (regular) ads will always be free!

Thanks for reading,
Tito