Though I love my Big Bucks Shamanic Princess 
cels, and the art is simply gorgeous... 
my favorite series to collect is still Gasaraki!
(or gasaCRAPPY as my husband likes to call it)^_^

Talk about a dime a dozen... I have seen huge 
lots go for a few dollars, but I think I have 
been able to amass some pretty nice shots here 
and there, and I love them!

And to keep with the original question, Yes, I 
have paid lots of money for some of the cels I 
own, and I know if I ever tried to resell them I 
wouldn't get back nearly what I paid.  But to me 
it is worth it to have that one perfect shot of a 
beautiful character.