Burkett, a coin dealer, purchased a dime purportedly minted in 1916 at the Denver Mint for $450. The coin was considered rare and valuable. Burkett, in turn, sold the coin to Beachcomber Coins Inc. for $500. An expert at Beachcomber examined the coin for up to 45 minutes before it was sold. When Beachcomber later tried to sell the coin, the coin was declared a counterfeit by the American Numismatic Society, and Beachcomber was unable to sell the coin. Beachcomber sued Burkett to rescind the sales contract. Is the contract valid or void? Explain.