Although I've only been collecting for 2 years 
now, I've noticed this interesting change in cels 
of late as well.  It certainly has changed from 
when I started. I'm a selective scene / character 
collector and it has been exceedingly rare for me 
to buy more than 1 cel in a 6 month period.  In 
the past 2 months I've shelled out for 6 cels 
because in my searches this has either been the 
first or one of the very few times I've 
encountered them.  

The numbers of cels seem to have decreased but 
some rarer ones seem to be hitting the market for 
once.  For example, has anyone seen so many NG 
Eva cels hit the market in this month?  I for one 
have never seen so many come out in such numbers 
much less a true Rei cel on auction.

As to the situation with Yahoo Japan.  I know 
there has been some discontent with their new 
policy.  I'm wondering what everyone thinks of 
these other auction sites jumping up (Bidders).  
Since I heard about them after the YahooJP 
change, I've been "stalking" them furiously as I 
do with my other searches.  I've noticed some of 
the cels that have done the switch from YJP, but 
in the weeks I've been searching it may appear 
that Yahoo JP is going to win out.  For the 
moment it still seems Yahoo is still holding the 
majority with little change.  If Ebay is anything 
to go by (Yes, I know Ebay in itself has 
problems.) it seems to me YJP is going to win 
this battle.  Your thoughts?