Should I trust brokers for a good deal in Aerocity?

Aerocity mein koi secondary market deal dekh raha tha, 2BHK ke liye. Builders se direct baat karna better hai ya brokers ke through jaana chahiye? Sunna hai brokers sometimes better prices nikal dete hain, especially for investors. But hidden charges ka bhi darr hai. Mohali, Zirakpur mein bhi options dekhe hain. Kya real negotiation margin milta hai secondary market mein?