Greater Noida builders: Kitna negotiation possible hai?

₹78 lakh for a 2BHK at One Leaf Group, Salarpur Khadar. Is this price final ya negotiate ho sakta hai? Sales guy bol raha no discount. Honestly, I thought builders always have margin. Parents bolte hain 5-10% toh milta hi hai. Greater Noida mein negotiation work karta hai? Kitna off expect karein?