Ruby Roman grapes are one of the most expensive fruits in the world. The first Ruby Roman grapes went on sale in August 2008 for 100,000 Japanese yen per 700-gram bunch, or ~$26 per grape. In order to be sold, each grape must be over 20g or about the size of a ping pong ball and be over 18% sugar. – WTF Fun Facts
Source: Ruby Roman – Wikipedia