Jim Foote of Raveis listed this house on Gregory Road in Cos Cob April 6 for $969,000. Eleven days later, Nancy Healy (Shore & Country) had a buyer. That’s how this process is supposed to work. What happens more often is that the seller lists it at, say, $1.075 million, waits 320 days and sells it at $925,000. This way’s less painful and far more productive.