Negotiation is dead in Greater Noida property market

Since last year, I've been checking investment options in Noida Extension. Builders like L&T Realty seem rigid. Kitna negotiation possible hai Greater Noida mein, real mein? Aur suna hai possession pe bohot hidden charges aate hain. Kya ye sab pehle se pata chal sakta hai? Matlab, total cost ka idea kaise lagega?