Erick Schonfeld’s Twitter posting and condoErick Schonfeld put an ad for his two-bedroom, one-and-a-half bathroom condominium at 46 Bergen Street in Cobble Hill on Twitter, in addition to setting up a Web site and placing conventional ads in the New York Times. Schonfeld’s tweet read, “Let’s see if Twitter can help me sell my apartment. Anyone know someone looking for a primo 2-bedroom in Cobble Hill, Brooklyn?” The condo hasn’t sold in the 23 hours since Schonfeld posted the message. Schonfeld told Curbed.com he has gotten a “decent” response but did not say whether he had received any offers.