This is a real time saver for users!
Administrator can connect user profile fields with Category and Contact fields. This way fields will be autocompleted with data that do not need to be entered each time users submit ads.
Create extra profile field: Facebook FanPage
Create extra field in contact: Facebook FanPage
*make sure you have selected the profile field you created in first step in "Default value - profile field"!
Now when user will be submitting new advert the Facebook FanPage field will be automatically filled with data provided in user's profile.
The other solution that can make user's life easier is the "Copy advert" functionality.