You will need to go to your Sales page, select the sold items you would like to be removed from the albums, and click "Delete Facebook Photos for Selected". It will then give you the option of the group you would like them removed from. Select and confirm.
With the Facebook update that occurred at the beginning of August, Facebook has disabled photo deletion from all 3rd Party apps, including Sonlet. We, along with others, are continually working with them to reinstate this ability. . Please vote on the bug report to help get some more attention on this issue. https://developers.facebook.com/suppo…/bugs/281309702603971/