Faridabad mein negotiation sach mein possible hai?

₹78 lakh for a 3BHK in Sector 35, that's what Goyal Estate Agency quoted. I'm currently in a 2BHK and looking to upgrade. Builder ne bola spot discount final hai, par phir OC aur PLC ke naam pe extra charges aa gaye. Faridabad mein negotiation sach mein work karta hai ya bas dikhawa hai? Any tips to avoid these hidden costs?