Dude -

Buy your bullion at a coin show, as I do. Regional coin shows have lots of competition in one room, it's totally anomyous, and all cash. (like buying guns in certain US states). I've found that the premiums are LESS than with dealers. I don't know if the laws are different in Australia, but it may be to your advantage to take a large wad of cash, fly to Hawaii or the continental US, and find a large coin show.