Send current owners a form letter, though one commenter suggested that a handwritten note would have a greater effect.
Contact the listing agent for any apartments that were taken off the market in the recent past. De-listed units may still be available, especially if the owners pulled it off the market because of lack of interest.
Ask the board president.
Contact agents most active in the building (look on StreetEasy.com).
Talk to the building's managing agent.
A final, crafty suggestion that got our attention: "Find the line you like, look up the owners' names in ACRIS and send them all a personalized hand-written card. If that doesn't pique any
interest, you're out of luck."
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