Royal Canadian Mint Million Dollar Coin (2007)

"Why did the Royal Canadian Mint make the world's purest and largest gold bullion coin? Because we can."

That and because they probably made a decent profit from the sale of each coin.

So it's worth 4 million US dollars today. I wonder who those 5 purchasers are.

They don't say what they were selling them for. I want to know what the difference between cost of the gold and price of the coin was.

Typically (say on Ebay), gold coins sell (eg, are bid up to) for the same amount as that weight in gold on the global market.

They usually sell these special coins for a profit over and above the price of the gold. They would have cost a lot to produce.

These coins were sold for 5 million a piece, so quite a large markup.