Signature Global Sector 93 visit — price negotiation possible?

Visited Signature Global in Sector 93 Saturday. Quoted ₹1.8 Cr for a 3BHK. My budget's tight. Gurugram mein negotiation kitna possible hai? Builders price kam karte hain ya bas small discounts? All-in cost mein kya-kya hidden hota hai? Stamp duty, PLC ke alawa, aur kya add hota hai before possession? Parents bolte hain bohot extra lagta hai.