Generally No

If the listing was created on ebay.com.au then you cannot charge a surcharge for the use of paypal ie by charging the buyer the fees on top of the total cost it is considered a surcharge.

I believe that on some ebay sites however you can stipulate that the buyer pays the paypal fees... Germany I think is an example???

So it depends on what site the item is originally listed as to the legality/ability of the seller to use the phrase.