How do you know if the person who got the cel is 
a "true fan" or not.  With a price tag like that 
I kinda doubt that they aren't clued in on who 
it is, and know the series.  I don't know too 
many people who would spend 400.00 on a 
character they don't know anything about. 

I agree with the other poster - you could have 
politely posted here asking that the person who 
bought the cel contact you regarding possibly 
selling or trading.  But flying off the handle 
isn't likely to win anyone's sympathy.