Many people purchase gold coins as a way to invest in gold in a (relatively) low cost and liquid way. Gold coins tend to contain relatively small amounts of gold (rarely significantly more than an ounce), and while many older gold coins are collected for numismatic reason, the vast majority of the so-called bullion coins (South African Krugerrands, American Eagles, Canadian Maple Leaves, etc.) are purchased for their gold value.
If your question is more akin to "Where could I sell a gold coin that I currently own", I would suggest going to a reputable coin dealer. If the coin in question is a bullion coin, you could also go to a jeweller or goldsmith. In any case, I would suggest that you know what the gold content of your coin is, what the current price of gold is, and whether you coin has any numistmatic value (aside from its gold value).
As a guideline, 1 troy ounce bullion coins will generally have bid/ask spread of a few percent (that is, a dealer would purchase a bullion coin from you at a couple of percent below the spot price of gold, and would sell it to you for a couple of percent above spot). Those spreads will widen for smaller coins (1/4 troy ounce and 1/10 troy ounce), although not by as much if you're dealing with multiple coins (i.e., the spread on 10 one-tenth troy ounce coins should be smaller a percentage basis than the spread on a single one-tenth troy ounce coin, although the spread on a single 1 troy ounce bullion coin would be better than either).
Coin collectors (numismatists) if it a collectible coin, if the coin is worth more as scrap metal then metal dealers buy them.
Many countries produce coins made from gold for the collector and investor market. No country these days could afford to make general circulation coins from gold or any other precious metal.
collectible coin dealers?
Coin collectors will buy your coins.
Coin collectors buy Commonwealth Games coins.
When you give clothes to somebody else that are previously worn. Consignment shops sell second hand clothes because somebody bought them new, wore them for awhile, and then donated them. The person who buys the clothing from the consignment shop now has a second hand piece of clothing
Jersey shore !
Any coin dealer.
1x25,6x10=85
You could try a coin dealer.
A Second-Hand shop buys almost anything. Find out where your nearest one is and tell them you don't want it anymore. You could put it on eBay
Donn Pearlman has written: 'Best buys in rare coins' -- subject(s): Coins, Coins as an investment, Collectors and collecting, Handbooks, manuals
Coin dealers and jewelers are known to buy coins.
You should always check with your local government for local laws. But otherwise, the whole point of a yard sale is to sell second hand 'new', almost new, or used items. As soon as a person buys a new item from a store, it automatically then becomes 'second hand'. So yes, yard sales sell second hand items.
You can sell your coins at any pawn shop in Seattle. You can also find a store that just buys gold. There are plenty of them around.