Hi Drac!  My ying and your yang again.  But 
seriously...

If someone maintained a "cel graveyard" where 
they even gave the appearance that they still 
owned the cel and had not sold it, then I think I 
would be offended.

However, as long as the cels are marked as "no 
longer owned", I really LIKE "cel graveyards" 
showing cels that I and others have bought from 
other people.

The reason why is that, by comtemplating the 
whole picture, of what someone has bought, and 
what they sold, and by contrasting it to what's 
left in their collection, you can really get a 
feel for who they are, how they collect, how they 
value cels, how they make distinctions between 
cels.  Sometimes, you can see how their life is 
evolving and how they are maturing as they cast 
off things that they once thought were worth 
competing for, and now have sold off.

I, at least, find that by contemplating other 
people's "cel graveyards", I grow wiser as I look 
at how they have evolved and changed their minds, 
and as I contrast it to the snapshot of where 
they are today.

I get a GREAT deal of value from comparing my own 
thinking and development to that which is 
implicit in the the record of other people's cel 
graveyards.

So, I like "cel graveyards" quite a bit, even if 
they showcase my best stuff.