Australia's REA Group, backed by Rupert Murdoch's News Corp, is considering a takeover offer for UK-based Rightmove, a leading property portal. The potential acquisition, which may involve a cash and share offer, targets Rightmove, valued at approximately £4.38 billion ($5 billion). REA Group has until the end of September to make a formal offer. The announcement has led to a surge in Rightmove's share prices.