Replying to Sort of callout

i bought a brand new windbreaker for sneakerhead and he paid me for the windbreaker. he told me once i ship out that he would pay me the shipping. the shipping was $13. he got the windbreaker 2 weeks after i sent it out. he told me he is transferring the money to his paypal account and will send it to me soon. his last log in was September 16th. his feedback is all good and everything so i wasnt to worried.
anybody know him and could let him know that i would just like my $13.
by the way, i shipped out the windbreaker at the beginning of august and he got it 2 weeks later