This is a 1972 doubled-die:
(notice the slight double impression on "Liberty"?)
The article said that some of these messed-up 1972 double-die pennies were accidentally released into circulation, and if you happened to find one, a coin collector would gladly take it off your hands for at least few hundred dollars.
Tony was determined to find one, and long story short, he eventually did. It was a crazy-lucky find, like winning the lottery. A coin magazine (yes, they have those) even published his story.
So, that's how he got hooked. And after almost 26 years of obsessing over coins, he has this wealth of "valuable" coin knowledge. He knows every US coin ever minted, what years they were minted, how much each date is worth at what grades... and that's the other thing: although his specialties are buffalo nickles and wheat pennies, he can grade any US coin at a glance, and tell you what it's worth.
You know what this means? He could work for Antiques Roadshow you gize. Do you have an old silver dollar that your grandpa left to you when he passed away? Tony can tell you exactly what it's worth ("a few dollars, if you're lucky").
Now, the leading US coin grading company is called PCGS. If a person thinks they have a valuable coin, they'll send it off to PCGS to be offically graded and recorded. Once PCGS grades the coin, they seal it in a plastic holder, give it a serial #, and its value is no longer arguable. The coin can be auctioned off, and the buyer can rest assured that the grade of the coin is fixed and they paid a fair price for it.
Why am I telling you this? Because Tony likes to search for PCGS graded coins on eBay, find ones that he thinks were graded too low, buy the coin at the current price, crack open the sealed plastic PCGS case, and send it back to PCGS to be "officially" graded. He's never been wrong, they always come back at a higher grade. Then he resales them on eBay at the higher price, and we're living on easy street, you gize. Eazzzzzzzz E street.