A Chesapeake Estate home sold in July 2020 for $6.5 million, as is addressed in this article
"The off-market sale, through the Ray White Whitsunday office, is the highest sale price achieved on the Whitsunday mainland since 2018, when Mandalay estate sold for $14 million to a Sydney family."
Further details regarding the home that was sold can be found at http://www.chesapeakewhitsundays.com/ and here's a link to a great video of the property and the surrounding estate.