Instructions
Purchase a coin price guide and take an inventory of your coins. Make sure the price guide you buy specializes in the specific coins you are trying to sell. By using a price guide to come up with a basic idea of the values of your coins, you will be less likely to be ripped off.
Locate the nearest coin stores and call them to make sure it is interested in buying your coins. Because gold coins tend to be quite valuable, you shouldn't have much trouble finding interested parties.
Take your gold coins to any coin stores that are interested in your coins and get an estimate as to what they will pay for your collection. By visiting multiple coin stores, you can get the best possible price for your coins.
Sell your coins to the highest paying coin store. You can try to talk a dealer up in price, but do not get pushy, or he may pull his offer off the table altogether.