Dreaming of living in a sand castle in coastal California? For a cool $108 million, you can — in beautiful La Jolla. There, giant sand castle-like mansion modeled after the Château de Versailles is one of the most expensive homes on the market in the Golden State these days — along with a $135 million new-build dwelling with a jazz bar and a 30,000-square-foot Georgian residence on 137 acres in Los Angeles. The sky-high prices appear to defy a slowdown in the luxury market over the last few