This might come as a surprise. But world’s best-selling gold bullion coins over past decade, comes from Turkey. The Turkish State Mint has issued 134,000,000 Meskuk & Ziynet gold bullion coins (equivalent to 405 metric tonnes), making them the most popular gold bullion coins in the last decade.
Coins are available with gold content ranging from 1.75 grams to 1 Oz. The price will depend on the amount of gold present. Will be somewhat around the market price of gold, with 1-2% on taxes and all that. But I am not sure whether you will be able to obtain them, if you are not from Turkey.
I am not sure about the case with United States. But I know that majority of the Meskuk and Ziynet bullion coins are sold in the Middle Eastern nations like UAE and Saudi Arabia. They are easily available from jewelry shops there and therefore, one shouldn't find any problems in importing to the US.