Yeah, you can either do 'direct deposit' or internet transer, what ever you want to call it, and pay for both parcel and postage (should be max $20 as quoted above)
Or for extra securtiy (if you are worried) you can do COD where he gives the package to Aust Post, they deliver it to your nearest Post Office and send you a letter. You then pay for the good + postage + COD charge (somehwere between $10 and $20), they then send him a letter and he goes to his post office and picks up a cheque made out to him (I think thats how it works)
Its a lot of extra fucking around, but by far the safest if you are worried