hmm... this topic crops up every couple of 
months. Anyway to me personally the fact that 
cels are no longer used for animation makes 
little difference, as I collect shows that have 
been made 10 or more years ago, so the cels I 
collect have been short in supply for quite a 
few years now. I suppose its like with 
paintings, just because the painter doesnt paint 
anymore (or is dead... painters have a habit of 
that) does not mean that its not worthwhile or 
not exciting to collect/buy his paintings.
Also apart from cel dealers I cant think of 
anyone who would buy cels from a "value point of 
view". Like the person before me said, if you 
want to make money invest in a house or the 
stock market.

Paul