In addition, selling little-known, unusual, or exotic coins may be difficult, or you may have to sell below the market value of the metal. Unless the dealer has an immediate need for the coin you purchased, he may be reluctant to repurchase it from you. In contrast, bullion coins are a fungible commodity for which there is always a ready, liquid, and transparent global market.

Advance fee fraud – Various emails circulate on the Internet for buyers or sellers of up to 10,000 metric tonnes of gold (an amount greater than US Federal Reserve holdings). Through the use of fake legalistic phrases, such as "Swiss Procedure" or "FCO" (Full Corporate Offer), naive middlemen are drafted as hopeful brokers. The end-game of these scams varies, with some attempting to extract a small "validation" amount from the innocent buyer/seller (in hopes of hitting the big deal),[68] and others focused on draining the bank accounts of their targeted dupes.[69]

So if you’re socking away funds for retirement, why save in dollars? The US dollar is consistently losing purchasing power. Plus, in today’s banking environment it can actually cost money to keep your savings in a bank account. Gold is one of the best ways to ensure the 100 dollars you have today will hold its purchasing power decades into the future.

Thus, even though some bars, coins, and rounds usually command lower premiums over spot, silver coins may warrant a much higher premium because of their collectible value. Also, another reason why coins command a higher premium is – they hold the prestige of being the only government-minted precious metals instruments and thus, enjoy a strong demand in the precious metals market.

As alluded to above, investors often make the mistake of buying so-called rare coins. These numismatic or semi-numismatic coins are meant for collectors, speculators, and hobbyists rather than people looking to reliably preserve and build wealth. Rare coin buying is exceedingly risky and often buyers pay inordinately high premiums and do not recoup their value. Rare coins are not really a gold investment… they are more akin to artwork. Some collectors buy coins for pleasure, because of their history or beauty, or because they have excess money to tie up in illiquid assets. Gold coins that are priced close to their actual melt value is a more prudent way to invest in precious metals.
The Mexican Mint issues the official gold bullion for the nation of Mexico. Backed by the federal government and Banco de Mexico, the nation’s central bank, the Mexican Gold Libertad coin debuted in 1981 and has been available annually since 1991. The coin series includes 1 oz, 1/2 oz, 1/4 oz, 1/10 oz, and 1/20 oz options. The Gold Libertads feature the following designs:
The official gold bullion coin of the U.S. is the American Gold Eagle. It was first released by the United States Mint in 1986 after being authorized under the Gold Bullion Coin Act of 1985. The design on the obverse in 1986 was Augustus Saint-Gaudens' depiction of Liberty. It is sold in both proof (most should avoid buying proof coins) and bullion finishes with a rendition of Adolph A. Weinman's Walking Liberty design. The weight of the bullion is usually used to describe Gold Eagle coins. They also have a marked face value, such as ten dollars on the ¼ ounce coin.
The European Commission publishes annually a list of gold coins which must be treated as investment gold coins (e.g. by being exempt from VAT) in all EU Member States. The list has legal force and supplements the law. In the United Kingdom, HM Revenue and Customs (HMRC) have added an additional list of gold coins alongside the European Commission list. These are gold coins that HMRC recognise as falling within the VAT exemption for investment gold coins.[10] The following list presents only the most common coins included in the European Commission list.