May 29, 2026 – 8.00pmPharma billionaire Dennis Bastas and his wife Gina paid a total of $136.1 million to create Australia’s most expensive estate through a two-title deal that takes in both the landmark Toorak Italianate mansion Coonac and an adjoining 1950s apartment block in Melbourne.Speculation over the final price has swirled since The Australian Financial Review first revealed Coonac’s vendors, Melbourne businessman Paul Little and his wife, University of Melbourne chancellor Jane Hansen, had sold their grand home in an off-market deal early last year.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles