Two 1792 pennies were recently auctioned off for a combined amount of $869,500.
The pieces were sold on Wednesday at the World's Fair of Money in Anaheim, California.
The Birch Cent, of which only 10 are known to exist, sold for $517,000.
The Silver Center Cent, so named because it has a small amount of silver in the middle, was purchased for $352,500.
A representative with Heritage Auctions which oversaw the sales has said they are happy with the outcome, even though the total did not reach the $1 million that had been estimated.
Both one-cent pieces have been traced back to the Founding Fathers of America and their efforts to break away from the influence of Great Britain.
Eric Bradley, from Heritage Auctions, told the New York Post: "We're looking at two coins that sold for more than 43 million times their face value, so you can't be disappointed in that."
He added: "These are coins that were developed and thought up by the Founding Fathers who were trying to differentiate themselves from British coinage and British rule."
The buyers have not yet been identified to the media.
10 incredible auctions
10 incredible auctions
The most expensive watch ever sold at auction fetched just under $24 million in November 2014. The gold pocket watch was made by Patek Philippe, and is the most complex ever made without the use of computer technology.
The Henry Graves Supercomplication was commissioned in 1925, and took eight years to make.
The world's most expensive stamp sold at auction in 2014 for over $9 million.
The British Guiana One-Cent Magenta is as rare as a stamp can get. British Guiana was one of the first countries in the New World to start issuing stamps, but in 1856, they ran out, and asked the local newspaper printer to produce extras.
There were two denominations: the four-cent, which is very rare, and the one-cent - of which only one has ever been discovered.
In May 2015, an anonymous London businesswoman snapped up the licence plate KR15 HNA for £233,000, making it the most expensive standard number plate ever to be sold in the UK.
Queen Victoria's bloomers sold at auction for £6,200, along with a pair of her silk stockings.
They have a 52-inch waist, and belonged to the monarch in the 1890s - "towards the end of her life when she had eaten a lot more than most people could afford to," said auctioneer Michael Hogben. In today's sizing, they'd be a size 26.
In 2014, a three-year-old slice of cake sold at auction for $7,500 (£4,800). The reason the stale cake was in such demand was that it was from the marriage of Prince William to Kate Middleton in 2011.
The buyer said he intended to give it away as part of promoting his Silicon Valley start-up.
A British coin sold at auction for a record-breaking £430,000 in 2014. After fees, the buyer paid £516,000 - making it the most expensive modern British coin ever to be sold.
The coin is only one of two in existence. It was a 'proof' for a gold sovereign which was meant to be produced to commemorate the coronation of Edward VIII in 1937. However, Edward abdicated in 1936, so the coronation never happened and the coins were never made