Here's some musings from a relative newcomer to 
cel-collecting:

There's the possibility that someone could take a 
scan that didn't belong to them and scam people 
out of money by 'selling' a cel they don't own on 
eBay or elsewhere.  I haven't been in the hobby 
very long, but I get the impression that this has 
happened enough times in the past that it is a 
real concern.

I don't see how having your cel scans plastered 
on a bunch of websites would increase a cel's 
value.  The popularity of the show or particular 
scene a cel is from will have an impact on it's 
price, but does an individual cel have 'fame' 
independent of the show? I would think that the 
quality of the cel itself (which is of course 
subjective), in additon to the fame of the 
*show,* would be more of a factor in value than 
whether it was on 1 website or 200.  

And what is value, anyway?  If you're 
auctioning/selling a cel, then having many people 
see it can increase your potential customer 
base...I guess in an auction this could increase 
the 'value' by having more people drive up the 
bid prices.  But that's more about advertising 
the fact that the cel is *for sale* than just 
having people see your cel on a random website.  
If a cel is in your personal gallery and it's 
your favorite and you don't plan to part with it, 
having people see it won't increase its monetary 
value.

And if you don't plan on selling on a cel, 
perhaps part of its value, besides just the 
personal enjoyment of having it, comes from 
having it as a unique additon to your cel gallery 
and a reason for people to visit your page.  If 
it's posted all over the internet, than this type 
of 'value' is lost.

I'm rambling, so I'll stop.  But I hope this 
makes some sense...it's nearly 4am and I should 
be in bed asleep.

Pasiphae