There's a common saying in real estate circles that property prices in Sydney double every 10 years. But is this actually true, or just an oversimplification? Let's examine this theory using two contrasting suburbs: Bellevue Hill, a prestigious area in Sydney's eastern suburbs, and Blacktown, a rapidly developing area in Sydney's west. Bellevue Hill: A Tale of Two Decades 2005 to 2015: Bellevue...