I've seen alot of beautiful cels in 
galleries...bur this one up on yahoo japan is 
probably the most sought after of the entire 
series.  I don't speak japanese, but I used 
altavista to translate...

http://page2.auctions.yahoo.co.jp/jp/auction/b2338
4381

It's a harmony cel from when the next form of 
Sailor Moon ( beyond eternal sailor moon) comes 
to tell her something ( i think...). You can see 
he cape, the details on her wings, and her hands 
clasped together like she's praying.

I am speechless...this one absolutley takes the 
cake.  I have no money...but I'm just excited to 
see this image. Heehee, had to share! ^_^