Levy Izhak Rosenbaum claimed to be in the business of buying and selling real estate, but he really bought and sold human kidneys for transplant, according to a federal complaint filed Thursday. The 58-year-old Brooklyn man was accused of trafficking in human organs, after a sting by an undercover FBI agent who agreed to pay $160,000 for a kidney from a live Israeli donor for her sick New Jersey "uncle." Investigators said Rosenbaum bragged about doing "quite a lot" of transplants over the last 10 years. "I am what you call a matchmaker," the complaint said the man, also known...