THE sale last December of a 131,633-square-foot office building opposite the train station in Greenwich for $ 97.75 million -LRB- an extraordinary $ 742.50 a square foot , in line with the high-end commercial market in Manhattan -RRB- split the Fairfield County market into what Ed Tonnessen , a senior vice president at Albert B. Ashforth , called '' the haves and the have nots . ''