Ten months after his death at age 70, the Los Angeles estate of actor, comedian, writer, and producer Paul Reubens—best known for his childlike, red bow tie-wearing alter-ego Pee-wee Herman—is available for the first time in almost four decades, asking just under $5 million. Built in the late 1950s and boasting nearly 3,000 square feet of living space, the midcentury ranch house sits atop a...