Prime London prices are a whopping 10.3% below their peak, creating rare buying opportunities with discounts everywhere—think high-end homes in central spots at negotiable prices that savvy investors dream of. For the ultra-wealthy eyeing Mayfair or Kensington, this index screams 'value alert' in a market that's finally turning buyer-friendly. Why now? It's the perfect storm of post-peak pricing and pent-up demand ready to reshape London's luxury scene.