Last weekend, the TV star was approached by a woman at a charity event in California who told him that one of this buyers had found the incredible fortune inside a storage unit.
In a video clip posted on Twitter, Dan said: “An older Asian woman at the table next to me kept looking at me like she wanted to tell me something.
“They called a second person and when that person opened it up – inside the safe they’re normally empty, but this time it wasn’t empty. It had $7.5million (£5.8m) cash inside.”
Dan told The Blast that an attorney contacted the lucky buyer claiming to represent the original owners of the unit and the cash.
The lawyer offered £465,000 ($600,000) reward for the money but that offer was turned down by the anonymous buyer.
Dan speculated on how someone could have left such a large fortune inside a storage unit.
He said: “$7.5million inside of a unit, I don’t think you’d forget it but maybe you were just in a position where somebody else was in charge of it, I don’t know.”
His wife and co-star Laura added: “Credit card went bad, it was finished, they moved away, perhaps the person went to jail – who knows what it was.”