I believe this is the real estate equivalent of "for a fat girl, she don't sweat much".

8 Serenity Lane, located on what its listing describes as “Cos Cob’s most beautiful cul-de-sac” has dropped its price from $2.895 million to $2.815.

Perhaps “Cos Cob’s most beautiful dead-end” would attract more of the traditional market for this section of town; at least they wouldn't be put off by some highfalutin French gibberish employed to describe such a low bar.