Since you still have others...(*prized Nuriko 
cels*)

I'd sell it to Mouse, since you brought her name 
up (she would most likely give you a good price 
for it too)--A simple sale.

My reason:
It would go to someone who loves it, and you 
could pay off your debt = Two good results, 
without much hassle or waste of time. IMHO.
E.