• Alec Baldwin has put his longtime co-op in the Eldorado on Central Park West on the market for $8.9 million. He's reportedly thinking about trading it in for a four-bedroom apartment at the Dakota, which has been reduced from $24 million to $12.5 million over the past year. [NYP]
• Former GE CEO Jack Welch is in contract to buy a three-bedroom pad at One Beacon Court that's next door to the condo he already owns. The 2,669-square-foot space was most recently listed for $8.995 million. [NYP, BHS]
• New York Times columnist Paul Krugman and his wife, Robin Wells, have paid $1.7 million for former Times reporter Joseph B. Treaster's three-bedroom co-op at 110 Riverside Drive. Meanwhile, the couple is currently in contract to sell their former apartment, a one-bedroom at 304 West 89th Street that was most recently listed for $599,000. [NYO, Corcoran]