It’s not for sale. But it’s still in limbo. Stony Brook University has created an advisory committee that will look at a wide range of options for its Southampton campus, including devising ways other SUNY schools could use the property and turning it into a creative arts center. The 13-member advisory panel has been tasked with developing a business plan to make the 82-acre campus succeed on the educational and economic levels. The school said it had cost two and a half times as much to educate students at the Southampton campus as on the main campus. The advisory group is being led by co-chairs Diana Weir, executive vice president of the Long Island Housing Partnership, and Eric W. Kaler, Stony Brook’s provost and sr. vice president for academic affairs. The group also includes representatives from Suffolk County Community College and Farmingdale State College, the SUNY system, Long Island Regional Planning Council and local businesses. There are no representatives from SUNY Old Westbury, Nassau Community College or other Long Island schools. Kaler said the group will seek to develop a “business plan during the fall of this year that enables the best possible uses for this tremendous asset.”