The advantages of bullion coins are: Take caution: Older, rare gold coins have what is known as numismatic or 'collector's' value above and. The worth of rare gold coins can be immense - and is generally determined by the amount of gold in the coin, its condition, and the spot price of gold. The. Consider buying rare gold coins since the collector's value of the coins can up the natural value of the gold. Be aware that buying rare coins.
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