UNDATED (CNN) -- This rare Chinese bowl has quite a history.

In 2007, it was bought at a New York yard sale for $3. The owner had it on display at their home for years before they became curious about its origin.

Turns out it's a 1,000-year-old treasure.

The 'Ding' bowl is an example of Northern Song Dynasty pottery.

It just sold at Sotheby's for $2.2 million.

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