The second most expensive item on Antiques Roadshow was a set of Chinese rhinoceros horn cups, which were initially purchased by a collector named Doug for $5,000. The cups, which were discovered in Tulsa, Okla., in 2011, were estimated at roughly $185,000 to $250,000 per cup. For five cups, the total group at action should have won an estimated $1-$1.5 million. Sadly, The New York Post reported in 2012 that only two of the cups were sold.

Source: https://www.distractify.com/p/most-expensive-item-on-antiques-roadshow