Bought at an auction and kept in a cupboard for years, this small painting turned out to be worth almost half a million dollars. The postcard-sized painting was bought for merely 30 pounds (around $38) in the British city of Canterbury in the early 2000s. It depicts a 19th-century landscape, and has a faint signature on its back. The signature was what prompted its owner to show the painting to an antiques dealer and forgeries expert. "Our investigation confirms this thing has passed through a number of hands over the years and it’s never been sold—it’s a fresh-to-the-market, sweet little item," the expert Curtis Dowling told Reuters. As it turned out, the landscape was painted by the 19th-century artist John Constable and is worth around $400,000.