As luxury home prices rose across the country, the $48 million purchase of a decked-out, three-level oceanfront Surfside penthouse was the most expensive U.S. home sale recorded in the first quarter of 2024, according to a new report by real estate website Redfin. Luxury home prices climbed nine percent year over year — twice the rate of non-luxury prices — while the luxury home supply increased by 13 percent, a record spike, according to Redfin…