It'll only be worth that much if someone buys it. I 
gotta go with Evangelion cels. On the rare occasion 
that one turns up, there GONE! No matter what the 
price. I've seen Mononoke cels that just won't sell 
because too much is being asked. I don't mean to 
rag on Asylum but all their stuff is on the pricey 
side. They do get GOOD stuff though. A Mononoke cel 
was on eBay a few months ago that had a bid of over 
$3000 and still had not reached the reserve! That's 
NUTS! He posted it twice and never got what he was 
asking. 

     Value of cels can get skewed, however. If 
you're someone who has a lot of disposable cash, 
than you're obviously willing to pay more simply 
because you can. It's a stretch for me to pay $200 
for a cel. A BIG stretch! Just because someone pays 
$1000  for a cel doesn't really mean it's worth 
that. It may be that the person can throw away that 
kind of cash without it being a problem.  Ebay is a 
wonderful example of people who have too much money 
to spend. If you know how to "read" it, eBay CAN be 
helpful in determining the value of something, but 
not cels, since cel are unique items.