The reason people refuse to send to unconfirmed address is because they have less protection as sellers from people trying to get their money back from Paypal. Paypal is known for siding with the buyers. But if they paid with a money order....no worries about filing with Paypal to get their money back and you have the Delivery Confirmation to prove it made it there for your own conscience and records.
If they did pay with Paypal....let us know and you may get another answer.

Marcia