Yes, I also collect the phonecards besides the 
anime cels that i collect. I, however, decided to 
keep it down to a few anime. They being lain, 
which i am proud to say have all that ever 
existed, boogiepop and kino no tabi. The last two 
i will never complete cause its just too hard to 
even try, especially living half a world away 
from japan. Id go broke if i expanded into other 
anime in any form. Some of the lain set are very 
pricey, since like yours are also not for sale 
items. 

So i recommend you hold on to it, that is if you 
didnt sell it. ;-) Oh, one more thing, yours is a 
beauty.

I collected them for two reasons, my love of 
those particular anime and my love of the techie 
stuff since ive been at it for many years. Not to 
date myself but before i was hacking at my pcs i 
was hacking at my phones as well.