I JUST sent my first payment for a cel that I
wanted badly.  Now, I suddenly see the same cel
from the same scene (different sequnce #) that is
SIGNIFICANTLY cheaper.  I mean, if I were to
disappear without a trace, the money I would lose
+ the price of the other cel would still be less
than the cel that I am currently paying for.
Now I know it is not good to back out of deals,
but what to do in a situation like this?  I know
that once you get into a deal, you can't back out.
 But, it is kind of difficult continuing to pay
for an item you now you got a bad deal on.  Should
I try to cut a deal with the seller and just buy a
different cel for the same payment amount I sent
him?  
Has anyone else been placed in this situation? 
Thanks for your advice.