06/07/2013 05:53 pm ET Updated Jun 10, 2013

Colorado Couple, Sarah Keepers and James Hull, Buy Antique Herman Miller Chair For $5 (VIDEO)

A couple from Littleton, Colorado recently learned that they've been sitting on an unknown fortune for over a year.. literally.

Sarah Keepers and her husband, James Hull, frequent yard and garage sales to find pieces for their resale business, Shabby Chic. A chair they purchased over a year ago for $5 at a garage sale turned out to be a Herman Miller original that was made in the 1940s, KDVR reports.

The antique had been gathering dust in the couple's garage for months before their discovery. “We almost donated it to the Goodwill," Keepers told KDVR, "But then I decided, I'll look at the bottom. And that's when we saw our Herman Miller chair.”

According to the news source, when the chair, known as a 'Plywood Chair,' was first introduced in 1946, it immediately went into the permanent collection at the Museum of Modern Art. An original has fetched anywhere from $14,000 to $140,000 in the past.

Earlier this year, $30 million worth of Arthur Pinajian art was discovered in a garage in New York.