Is This A Fake ?

Bugger! That means probably won't be purchased by a forum member.
I was really looking forward to accurate measurement and mass report; as well as detailed description of appearance.

Maybe we should start a subscription to purchase it (regardless of cost) and obtain an expert appraisal. After all listing does say "This coin is guaranteed to be a genuine Australian Coin. Should you find it is not and you are dissatisfied with the genuineness of the coin, simply return it for a full refund (minus postage costs). Please note, the coin must be returned in condition it was sent to be eligible for the refund. this period is for 30 days from time of purchase, after which the sale will be considered closed."
Then again the listed return policy is "No returns or exchanges"!

Looks like a gamble there.

Jeff

Trusting someone that says "No exchanges or refunds" is basically like going into a shop (say JB Hifi) & they have a sign on their counter saying "We only accept cash"...I think I'd pass.

But it all depends how much you're willing to pay for a cast coin.