Ok, I'm going to come down in the middle of this 
issue.  

On the one hand, I don't see that it hurts 
anyone's chances of getting this cel by posting 
an auction URL.  It's a *very* public site and 
people on this forum talk about YJ alot so I 
think you would have to have your head stuck in 
the sand for this to be a "secret".  It's the 
same reason I think the eBay advertisements are 
mostly unneccessary because you know that most 
cel collectors already keep a very close eye on 
all auction postings for their favorite series.

On the other hand, Yann has requested in the past 
that we refrain from simply posting auction URLs 
with phrases like "Look at this awesome cool cel 
I found on YJ!!".  It clutters up the forum and 
is unneccessary since everyone can find these on 
their own.  You might want to check the archives 
for Yann's post.

I know you just want to be part of the forum 
community and post some helpful information for 
fellow collectors.  I just thought I would try to 
shed some light on perhaps why some others posted 
the way they did.

Regards,
~Luna-Art >^.^<