How safe would you say it is to send money by paypal for a purchase on gumtree?

Am trying to buy iphone 5s on gumtree and this guy wants to sell it, however since i'm in melbourne and he is in south australia i have to do bank transaction, i have decided to do the transaction using paypal since i have heard it is safer, however would you say it is safe to send the money and receive the iphone over postage or should i just let this one go?
list pros and cons too, as well as justification for your response.

If he has paypal then you can pay him by credit card on paypal, thats safest. At least thats what I would do.

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