Media giant Oprah Winfrey's Chicago-area real estate portfolio is a bit lighter these days. On Tuesday, Winfrey finally unloaded her eight-room, 4,607-square-foot Streeterville co-op unit for $2.75 million, closing the chapter on an unusual real estate odyssey. Winfrey actually had never occupied the three-bedroom unit, which is in the building at 199 E. Lake Shore Drive. She paid $5.6 million in 2006 for the sixth-floor space but had a change of heart after buying it, and she decided to remain in her massive duplex condominium in a different building a few blocks away.