Asylum Anime is the only one with cels there.
They have a ton of books out... but a lot of the
stuff is from the same sequences, and a lot is
EXPENSIVE.  There are some gorgeous cels there
(X, the Utena ending from the site, Totoro of
Satsuki w/umbrella, Catbus from Totoro, Lodoss
OAV, etc) but I don't think any of those are
prices at less than $500, and many are over 
$1000, $2000 etc etc.  They also have (had?)
a Tenchi hanken cel for $3200.  

There are a few rarities in there, and a lot of
other stuff too... but unless you're looking for
those few rare cels and have a LOT of cash to
shell out for them, I don't think there's anything
else there to make an extra trip & pay the
door fee worth it... 

Of course, I may just be jaded because the idea
of spending over $50 just makes me cringe now
(used to be no problem)... most of the other
tables didn't have much worth seeing, and 
Asylum can be browsed in about 30 min. or so...
(shrug)

Of course, there may be other ppl who disagree
with me.  =)

Peace!
Kim