Have a spare $15 million?
If you do then you're spoilt for choice with Sydney's top three penthouses back on the market, promising everything from huge floor spaces to great harbour views.
But if your budget doesn't quite stretch that far, don't despair. There's an array of other penthouses to be bought - off the plan or just completed - as well as a few old classics.
''There's a lot of choice around at the moment, so the penthouse market is challenging,'' says...