^ I was going to say, perhaps your scale I'd out whack.
Generally there is some variance on both sides with items just to account for facts such as air bubbles and things I think. Might want to check the official websites variance.
http://www.ebay.com.au/itm/Gold-Silver-Bullion-Scrap-Coins-Indium-Copper-Bulk-24K-Deceased-Estate-/151240837583?pt=AU_Bullion&hash=item2336a809cf&_uhb=1
This can't be legit can it?
I mean that's at least 10oz of gold...