The listing agent information can be found if you click the "More Details" button on the listing link you included with your question. I tried to contact the listing agent and was informed that there is a tentative deal on the property and that it is not being shown at the moment. Perhaps you should try to contact her yourself and see if you get the same story.
I do have several similar properties listed for sale in the area that may meet your needs. If you want contact me and I can tell you about them and/or show them to you.
Madison Estates & Properties, Inc.
Office: (718) 645-1665