I was also disappointed with the cels selection
at Otakon.  Unlike Katsucon, I actually had
money to spend this time; unfortunately, I
didn't find any cels I really had to have.  Maybe
the dealer's room was just cleaned out on Friday.
I did find out that my #1 most wanted cel was
sold on Friday -- before I could even get to the 
con -- which only added to my disappointment.

If the person who bought the Eve cel from 
Anime-Link is reading this, I would offer you
a *really good* trade for that cel.  :)