SOLD IT! Function
Please note that when a non-editing user clicks Edit Ad, they are taken to a screen that says "You do not have permission for this action!" and then it refreshes back to their ad.
However, if they click SOLD IT, they are taken to the "You do not have permission for this action!" screen, but then the screen turns white sitting on showproduct.php?product=
I have this on my active ad forum plus a freshly installed test forum.