One thing I wouldn't do is send it to any address other than the one on his paypal account. That would be an expensive mistake as you're only covered if you ship to his address currently on the account. The best thing is you got the card back and can either wait to hear from him to refund or reship.
IF YOU CAN'T TAKE AN HONEST REPLY THEN DON'T ASK.
ALWAYS BUYING '97 LEGENDS AUTOS OR H.O.F. AUTO NEEDS