So far, no fakes for me. I've been lucky, because 
Outlaw Star is an easily copied series. The cels 
were never officially released by the studio, so 
people can pretty much do as they like. What I 
try to do is to only buy from reputable sellers 
and dealers. What usually cinches it for me is 
when a cel is TOO perfect for my taste. When this 
happens, I really scrutinze it and try to find 
out more about the dealer or seller. Luckily, I 
have formed my own little hub of sellers and 
dealers that I am confortable with buying from.