I agree that this is a very interesting topic, 
and there is no right or wrong answer. However 
it's always nice to treat someone the way you'd 
like to be treated and for that reason, if 
someone does express a genuine interest in one of 
my cels, and I did offer to keep them in mind 
should I ever part with it. Then I do try and 
remember them and offer it to them first. If we 
can work out something we're both happy with, 
then the person gets the cel and the cel wouldn't 
even make it to the boards & most likely no one 
else would even know the cel had been parted 
with. (at least until it appeared in the new 
owner's gallery)

I have done this especially when I'm lucky enough 
to obtain a cel that is someone else's wishlist 
coz I too know (boy do I know!) what it's like to 
want a wishlist cel, and if I needed or was 
considering parting with it, then why not to 
someone who I know would appreciate it & cherish 
it a lot, & even maybe more than me? However 
there are times I do forget, so while it would be 
great if people did the same with cels I asked 
about, I wouldn't be really offended if they 
forgot especially if I might have asked about the 
cel ages ago. And sometimes if you mention that 
to ppl while making an offer etc, they tend to be 
really nice about it and offer it to you coz they 
then remember anyway. I know I have some big 
wishlist cels that I wouldn't have if it wasn't 
for someone being nice enough to remember me, 
sometimes even when they don't really have to 
part with the cel, but just coz they know I 
really want it :) Big thanks & hugs to those 
peeps (they know who they are)

Cheers,
Winnie.