NRG Energy Inc.’s GenOn Energy Inc. is selling its 352 MW Shelby County natural gas-fired plant in Neoga, IL and the 525 MW coal-fired Seward plant in New Florence, PA for an aggregate estimated price of $138 million. A unit of Rockland Capital LLC purchased the Illinois facility and Seward Generation LLC bought the coal plant. NRG Energy Services agreed to provide operations and maintenance services to the Seward plant.