Of course they would be. A bullion retailer, trying to make their name known in the community, won’t be flogging any bullion without it being tested for purity for the sake of their reputation.
Bullion Now is very active on these forums and on their Youtube channel. I have purchased/won auction items off them before and have no issues in doing so again. And unlike some other bullion dealers, their postage costs to WA are very reasonable.