Zillow Advice: Buying Process - Any NYC COOP Pro's out there? I'm trying to get a sense of volume for Upper East Side Coop sales?

Zillow Advice: Buying Process - Any NYC COOP Pro's out there? I'm trying to get a sense of volume for Upper East Side Coop sales? http://www.zillow.com/advice-thread/Any-NYC-COOP-Pro%27s-out-there-I%27m-trying-to-get-a-sense-of-volume-for-Upper-East-Side-Coop-sales/177443/ Zillow Advice | Zillow Real Estate