A property agent has suggested buying a house in a slum area in Thane, which is slated for a Redevelopment and Rehabilitation (R&R) scheme by MMRDA on Central Railway land. While a survey has been conducted, buying property in such a situation is not advisable as the scheme is not yet finalised and the transaction could be risky. It's crucial to consult a local lawyer to scrutinise all documents and understand potential encumbrances before even considering such a deal.