First and foremost, the gold coin dealer sells gold coins to a customer. The customer may be a collector  of gold coins, a person investing in collectibles or a person simply investing in bullion. The gold coin dealers procure coins from a number of sources and then sell them to people who want to buy gold coins. Most of the gold coin dealers do their business within the country but there are a number of veteran dealers who can export gold coins overseas with proper licenses and paperwork.