The 5c coin that could be worth hundreds
Brad Sanders became a coin collector after discovering a rare coin in his possession, and he's shared some tips and tricks for others to also become rich.
The Adelaide man's penchant for coin collecting began after he couldn't find a 5c coin dating back to 1972.
He had $100 worth of 5c pieces that covered every year except 1972.
"I couldn't believe it so I started doing my research and found out," he told 7 News.
After doing some research, he discovered that very few coins had been minted in that year, making the coins that had been very valuable.
The Royal Australian Mint's website reveals that in 1972 just 8.3 million coins were created. For comparison, 48.8 million were printed the following year.
Mr Sanders found a 5c coin from 1972 and it sold for a whopping $200 - more than all his other 5c coins combined.
He and his partner Cristy have now become avid coin collectors, buying, sorting, and selling thousands of coins every year.
As well as watching out for coins from 1972, Mr Sanders also said to look out for the 2013 $2 coin commemorating the 60th anniversary of Queen Elizabeth II's coronation.
It could make you a nifty $50 profit.
Another special coin is the 2012 Remembrance Day $2 coin, which has in the past sold for $200.
He says it's also worth checking for abnormalities such as stamping errors like double rims or upside down queens.
"If you have coins around check your change jars," he said.
Earlier this year, a $1 coin made the news after it was listed on a coin collecting website for $4000, because of a minting mistake.
Other experts have spoken out, urging people to double check their golds and silvers.
Coin expert David Jobson told The Morning Show last month that all it takes is one mistake at the mint to make you "get lucky".
Mr Jobson said the value of the coin depends on its quality - a really high quality coin could go for $4000 or $5000, while one that's poor quality is only worth about $300 or $400.
He also recently sold a 20-cent coin with scalloped edges - caused by a printing mistake with a Hong Kong coin - valued at a staggering $20,000.