When I tried to finish purchase through Paypal, it refused my postal code. I was physically unable to complete purchase as a result. I emailed seller for assistance, he responded by saying that it was a typo and that he couldn't ship for free. He sent a new invoice with $30 shipping added on and also he opened a cancel transaction case so I could stop the transaction if I was not happy. I do not want to cancel, I want him to honor his original listing. Any ideas how to proceed from here?