For Mari Nuzum, who spent three years searching, it’s the best time to buy a home in Greenwich, Connecticut. She, and her husband Richard, bought a six-bedroom Colonial revival in the back-country neighborhood for $3.85 million. A year ago it was listed for $4.75 million.

“I had in my mind exactly what I wanted for our family,” said Nuzum, who moved in July with her husband, president of investments at Mercer Global Investments Inc., and their four children to be closer to school and within commuting distance of New York City, about 40 miles to the south. “My husband said, ‘Just wait, the prices will keep going down.’ ”