After brokering Brentwood's $53M Melhill Estate, Shauna Walters and Nicole Plaxen align with premier global luxury real estate brand as wealth migration reshapes the geography of high-end real estate LOS ANGELES, Dec. 17, 2025 /PRNewswire/ -- Shauna Walters and Nicole Plaxen, the power broker duo behind Walters | Plaxen Group have made their most strategic move yet, joining Sotheby's International Realty in an affiliation designed to mirror the borderless movement of global capital itself. The announcement ...