OH yes... I have a tendancy to buy cels because I 
love the scene they are from, and forget that I 
don't like cels that aren't artistically 
attractive in some way.  Usually I am lucky and 
able to break even, but not always.  Another 
option is to try to trade it to someone... then 
you really don't have to judge how much money you 
are losing if you iwll lose money selling it, you 
will instead get to admire the new cel you are 
getting in exchange for one you didn't quite like 
^^