Simple, tell him that you will pay 65% whatever is the bill issued from Honda.
So all he needs to do is to present the actual bill from Honda dealership to you.
I bet he probably has insurance and he would be paying for the depriciation only and now he wants you give him extra money.
coz if he was actual owner in PK he would have preferred simple dry denting considering the value retention of the car and save paying absurd amount to Honda.