Object cels are some of my absolute favorites.  
I'm still kicking myself for not getting a 
certain one that I wanted a long time ago.  I 
have others that I haven't scanned, including a 
hat, a weird pink object with some kind of 
glowing force field around it, etc., but I don't 
know what series they are from.  These are some 
of the ones I've scanned. Upper left is from 
Slayers, upper right from Chou Kuseninarisou!, 
and the bottom two are from Legend of Galactic 
Heroes.