That $.25 autographed Michael Jackson cassette thrift store find could be worth much more!

For this North Carolina couple, one man's trash is truly another man's "Thriller."

Mike and Amber Hernon of Concord were scouring their local thrift store when they purchased an old Michael Jackson cassette for 25 cents.

That seemed like a reasonable price, until days later, they realized it was signed by the King of Pop himself.

"We were ecstatic," Amber told InsideEdition.com, "kind of in shock."

She said they were looking around their local thrift store, Heavenly Treasures, when two cassettes caught their eye — one by Fleetwood Mac and Michael Jackson's "Bad."

Mike joked that even though one of their cars had a cassette player, they hardly ever used it.

But both their families had been huge fans of Michael Jackson, and for just a quarter, "we couldn't pass it up," Amber said.

They tossed it aside, but days later, Amber said she wanted to show their sons pictures of the superstar behind such hits as "Billie Jean" and "Man in the Mirror," and what she found inside the cassette was truly shocking.

"We opened it up and realized it was signed," Amber said.

Susanne Lambert, the owner of Heavenly Treasures, told InsideEdition.com most of the goods they sell are purchased in estate sales.

"There's no telling what house it came from," Lambert said of the cassette. "They might have passed away."

Amber said the piece of memorabilia is "pretty priceless to us," and her husband insisted they weren't interested in finding out the cassette's monetary value.