The U.S. Mint publishes a list of dealers by state, according to Kiplinger. The U.S. Mint checks the Better Business Bureau for online complaints against the companies on the list, but it does not vouch for any of them.
When investing in gold, investors should check the spot price for the commodity, recommends Kiplinger. While reputable dealers charge a markup on gold, usually based on the amount of gold the investor is buying at one time, the price should not go beyond 5 to 8 percent of the spot price. American Eagle bullion coins are popular with investors and have a lower markup than collector's editions or coins with historic value.