What does it mean when a unit of condos that had been on the market are suddenly “No longer available?”?

Please see this listing for an example of what I’m talking about:
http://www.streeteasy.com/nyc/sale/180983-condo-525-east-12th-street-east-village-new-york

what types of car and condo insurance are available to state employee teachers?

Need more info on water damage claim a condo had i’m looking to purchase? What resource(s) are available?