There is absolutely nothing wrong with what you 
are talking about!  It DOES bug me to think (and I 
don't KNOW this I just THINK so dont flame me 
please!) that people buy cels from sellers that do 
not ship internationally, get them shippied to a 
freind in Japan, then get them shipped here to 
sell.  This is not fair because it is deliberately 
hiking up the price for people who don't have 
friends who will do that, and is basically abusing 
friends for profit as well.  I have a VERY good 
friend in Japan who would not mind being the 
"middle man" in a personal transaction for me at 
all, but I would never think of using my friend to 
help me make a profit and rip off American cel 
collectors.  Of course deputy services are 
different, as the collector knows exactly what he 
or she is getting into before hand.

But there's nothing wrong with selling cels that 
are in your collection that you don't want, 
whether they were part of a big lot of cels or 
just something you don't feel the need to keep 
after awhile.  It's better to pass it on to 
someone who can love it more, and in those cases, 
the seller and the market are solely responsible 
for setting the selling price.  If I sell my $2 
Ranma cel for $30 on eBay tomorrow, you can't say 
it's inethical because it's MY CEL.  If you think 
that's too high, then don't bid... simple.  (I'm 
not doing that, I love that cel but its just an 
example!)

A lot of collectors I know are too rich for their 
own good... unfortunately this seems to be a 
hobby that attracts the wealthy, and maybe that 
will make the prices go higher because $300 or 
$400 or $800 for a cel doesn't affect some 
people's ability to pay the rent... that sucks for 
us poor people!  BUT you can't say it's 
inethical... the prices of cels are really 
determined by the market.

Tifa