Secondary market negotiation in Gurgaon is key

U Block – I'm checking out resale flats here. Budget is around ₹1.8 Cr for a 2BHK. Tulip Infratech ke naye projects ka all-in cost bohot high lag raha. Secondary market deals mein negotiation better hoti hai kya? Builders se zyada milta hai discount? Aur hidden costs at possession se kaise bachun? Suna hai bohot surprise charges hote hain. Koi experience share karo please.