I have a fair number of what you define as "high 
end" cels.

The funny thing is that, just last night (Sunday) 
I did a marathon session of reorganizing and re-
filing my cels in their Itoya binders (including 
a couple of new binders), and of course I handled 
and looked at each cel.

At the end of the evening, I realized something 
funny.  The cels that I really enjoyed looking 
at, that made me smile the most, that I enjoyed 
sequencing with other cels to tell a little story 
in the binder, were mostly the cheaper cels.  The 
cels that made me smile were almost all my 
cheaper cels from Akazukin Cha-Cha, Battle 
Athletes, Burn Up, CCS, Jubei Chan, Outlaw Star, 
Kenshin, Princess Nine, etc.  Plus, one expensive 
cel of Spike and the Chocolate Chicks.

Most of the expensive cels from AMG, Cowboy 
Bebop, etc. were nice, but they were like stately 
old museum pieces in my collection.  They did not 
make me smile like the cheaper cels did.

I thought about posting that observation here, 
but decided not to.  And then you asked this 
question; so I answered it.  I'm not really sure 
what the moral of all this is.

I have never tried to sell an expensive cel, but 
I think that I may soon be able to answer your 
question about what happens when I do to to sell 
expensive cels....