Hi Drac,
thank you very much for the very useful infos,
sorry for the lateness of my reply. 
Unfortunately I have no Sayuki or Yoma cels or 
gengas and it will be a long time before I can go 
back to Japan (I remember a shop in Nakano who 
had a huge amount of Sayuki stuff). 
I'll use the animanga auction system soon,
thanks again,

marco