I'll have to jump on the Pro-Anime Chaos 
bandwagon here, too.  I've had several dealings 
with AC before, and they've always been very 
professional and courteous.  Besides, as someone 
else pointed out, the difference in their 
commission from 21,000 to 29,999 yen is not very 
much - only $9 if I calculated it right.  If it 
was me, I'd just chalk it up to the Halloween 
spirits.  Besides, now you've got a good story to 
tell about how you won your wife a cel by only 1 
yen.