An opera executive whose late husband controlled a fortune estimated at $3.3 billion just parted with a Sherry Netherland co-op for more than a song. Frayda Lindemanns' two-bedroom pad sold to an anonymous LLC, "GAAL NYC LLC," for $11 million, according to records filed with the city today. The unit at 781 Fifth Avenue has a master bedroom with views over Central Park, and the new buyer will have access to all the amenities of [...]