I don't think you should contact the seller about
this.  I think what may also be a problem is that
you seem to be still attached to those cels and it
irritates you that she is selling it at a much
higher price than what she paid you for.  While I
also get highly irritated when I see prices being
jacked up, but it is also one major reason why
people have interest in buying cels.  For their
value.  

To be honest, there are lots of cels that I REALLY
like even more because of their value and rarity
(of course I bought them because I think they're
awesome, but being rare and valuable adds even
more to the joy!).  This is just the way things
are.  I think you should definitely not let it
bother you.

Star Phoenix