Has the super-secret formula for Coca-Cola been discovered? A Georgia man believes so. Cliff Kluge, a pilot and antiques dealer, along with his wife Arlene, believe they are in possession of the original recipe. Found in an old box of papers purchased for $100 from an estate sale four years ago, Kluge says the yellowed paper dates back to 1943 and belonged to a well-known Georgia chemist. Now he wants to sell the recipe on eBay for a starting bid of $5 million.

“Whoever had typed this letter had seen the original recipe,” Cliff Kluge told ABC. “The letter always references Coke and products and stuff.

“We believe it is definitely related to Coca-Cola.”

But Coca-Cola denies the recipe is legitimate. The company has closely guarded its formula for more than 100 years, locking what it claims is the only copy of the recipe in a safe at the company’s Atlanta headquarters. Coca-Cola chief archivist Ted Ryan says Kluge is far from the first to claim he’s found the original recipe.

“At least once a year, somebody shows up and says, ‘I have the original formula for Coca-Cola. How much do you want to pay me for it?’ Well, I don’t need to pay them anything for it because we have the only real one,” Ryan told ABC. “We know he doesn’t have the formula. There is only one copy. He has what one of the many imitator copies floating around out there. So I’m going to go to sleep peacefully knowing that we still have our copy of the formula.”

Is Coca-Cola overly confident that its formula has always remained a secret? Sure, the company has guarded the treasure for more than a century, only revealing it to two employees at any given time. Those two employees are never placed in the same airplane to ensure the recipe can continue as a handed-down secret. But the world’s most famous soft drink was invented by pharmacist John Pemberton in 1886. Isn’t it possible that at some point during the past 127 years someone leaked it? Perhaps to a Georgia chemist, perhaps to someone else?

And if someone did come up with Coca-Cola’s recipe, wouldn’t the company likely deny its legitimacy—in essence throwing out a red herring? By denying the formula is original, the company can claim the true recipe is still top secret.

Regaradless of what Coca-Cola says, Kluge believes he’s found the “real thing.” Unfortunately, it doesn’t look like anyone who can afford it is taking him too seriously. With just less than three hours left in his auction, there’s not a single bidder. Perhaps he’s just asking too much. Kluger even admitted the formula may not be worth millions, but he still believes he’ll get a few hundred thousand dollars out of it—and a lot of fun.

“It’s just excitement,” he told Fox. “It’s an Easter egg hunt, looking for eggs out there. And when you come up with something like this, it’s Christmas.“