Advice on wire transfer and shipping to APO

I responded to a "wanted" post. The buyer is German and has agreed to payment via wire transfer, but wants it shipped to a friend with an APO address. I think APO stands for American Post Office and assume that means the friend is in the US Military in Germany. AFAIK, once the money hits my account via bank wire, the funds cannot be reclaimed, so I would be protected, but want to hear from anyone about the safety of this kind of transaction.