hi ... just check the following if you had infact listed the product for international buyers .....
if NO ... you may back out
if YES ....
i would not suggest you to think about cancelling the order without taking the buyer in confidence ... it is not the right attitude ...
if not much of a monetary loss involved .... honour the deal and debit the expenses to LEARING ACCOUNT ..
if a lot of monetary loss is involved ... i would suggest ... have an honest talk or mail the buyer about your honest problem .... i am sure the buyer will understand figuring from your ratings that you are a new user ....
the whatever the outcome ... think hard and take a descision ... the right attitude will help a long way .. i suppose
regards / hittesh