I have two reasons to dislike this - mostly purely
technical: bandwidth!! As far as I'm concerned, 
the sold cels are just a waste of bandwidth on 
these image-laden pages already (*power-surfer 
w/56K line speaking -_-'*). The second thing is 
that with particularly *expensive* cels the images 
can be used fraudulently - though this could be 
remedied by stamping "sold" across the image 
itself... The first reason could be addressed by 
a separate "sold/hold" page (like anime-cel does,
kinda).