It is to be noted that the market price for the gold or bullion is determined based on per ounce basis hence the weight of the bullion or gold will always factor the overall value for the benefit of the users. It is also important for the users to understand that purity of the gold or bullion plays a important role in the resale value of the gold or bullion. The purity of the gold or bullion varies from gold to gold and is dependent on where it has been minted., It is to be noted that the gold or bullion coins which are backed by the government has a purity content of 99.99% which is supposed to be the highest level, which is available for the benefit of the users. It is to be noted that most of the gold or bullion supplied nowadays to the different users comes with the purity level embossed in it so that the user can understand the purity level of the gold or bullion that has been purchased by him. Besides the superior gold group, there are other sources from where the users can trade for their gold or bullion requirements. The Gold101.com and Bruce Sands are other reliable sources like the Superior Gold Group, which the users can explore for their trading of gold or bullion requirements.