These appear to be fakes, especially the Chibimoon sketch.
Why I say this is because recently a cel on YJ from this sequence was sold with its sketch -
http://page7.auctions.yahoo.co.jp/jp/auction/g44264682
The cel was sold w/ the sketch and the Toei seal. The cel, along with the sketch, was labelled 'B2'.
Now, compare this to the Chibimoon sketch labelled 'B6' on E-bay,
http://cgi.ebay.com/SAILOR-MOON-SETTEI- ... dZViewItem
You should notice that, when the images are fused, they're exact matches....which, shouldn't be the case since the sketch on E-bay is labelled 'B6'..and there's no way a 'B6' would be a complete copy of a 'B2'.
I've already taken the liberty of reporting this auction to E-bay, but I would appreciate if others did the same. Perhaps we can get this seller's listings closed down and avoid some really nasty problems, especially for those who may not know any better.