Bad news for property snoopers: the UK’s most desirable homes are disappearing from estate agents windows, adverts and online searches. They don’t have For Sale signs, let alone glossy brochures or online walkthroughs, and you certainly won’t find them at auction. Around the world, an increasing proportion of deals are taking place off-market, in private or “whisper” sales. Instead of publicly marketing a property, agents in this most exclusive of sectors use their contacts to discreetly match buyers and sellers. Only a handful of people know that a deal is taking place, and the rest of the market will only hear about it after the deal is closed, if at all. I spoke to agents in London, Dubai and Melbourne to find out the tricks of the trade in this cover feature for Modus, the magazine of the Royal Institution of Chartered Surveyors.