A 1-inch gold LEGO piece sold for $18,000 at a Pennsylvania Goodwill.

Sometimes, you might find real treasure in thrift stores.

A rare LEGO piece was sold for a small fortune by a Pennsylvania Goodwill.

A box of jewelry, including a gold Bionicle mask from the popular action figure line from the early 2000s, was donated to the Dubois, Pa. store.

A representative from Goodwill in North Central Pennsylvania stated in an interview with WTAJ that they were unaware of the value of the item they found, which had been donated to the State College store and then processed.

The Kanohi Hau masks, made of a rare material, were given away as prizes by the LEGO brand starting in 2001.

CBS News interviewed Chad Smith, an executive at Goodwill in North Central Pennsylvania, who revealed that 25 items were given away and five remained for employees who worked at LEGO. Twenty-three years later, one of these items resurfaced and is truly unique.

The 1-inch-tall 14-karat gold LEGO piece was sold for $18,101 after 48 bids.

One of LEGO's most expensive sets is the Star Wars Millennium Falcon, with over 7,500 pieces and a retail price of $850.

The LEGO Titanic, measuring four-and-a-half feet long, is one of LEGO's largest sets ever and costs $680.

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