A shopper discovered a unique Chinese libation cup at a thrift shop in Sydney, Australia. They bought the cup for A$4 despite its significant chip. After assessing the item, a Sotheby's specialist appraised it at A$20,000 to A$30,000. The item was later auctioned for A$75,640, significantly exceeding the original purchase price. This event highlights the potential hidden value in thrift store finds.