1. Visit the thread where the item was sold, and while you're looking at that thread-copy the thread "http" address from the internet window.
2. Then, visit the buyer, or seller's profile-the person that are leaving feedback for (view public profile-for the member).
3. Under their join date in their profile, you'll see Submit Feedback (in blue) to the right of that. Click on that.
4. Under their feedback score, you'll see Submit Feedback for XYZ Member, or whatever their member name is. Click on that.
5. Choose the first two from the drop down boxes, add a short comment. Paste the thread "http" address from step #1, above, and ADD DETAILED COMMENTS in the big box. This can be short, and is required!
Have fun...