Actually, the way I run things when I sell a cel 
is that I ask the buyer to contact me when the 
cel arrives to them.  Once they do that, I take 
it out of my gallery.  The ONLY reason I wait 
even that long is just in case it comes back to 
me, or some crazy scenario happens in which I 
end up with the cel again.  After it's been that 
long though, I would ask the seller to take it 
off.  It's no longer their cel, and it could 
cause false ideas of gallery browsers if they 
see the exact same cel in two galleries.  Right?

As far as Rubberslug goes, it should be very 
very hard to save the images already.  They 
should already be un-right-clickable along with 
other defenses.  Jason is a good man!  So, if 
it's not working, send him an e-mail.