KS Builders se kitna price negotiate kar sakte hain?

Ghaziabad mein builders se negotiation kitna real hai? KS Builders And Properties se Hindan Residential Area mein flat liya hai. 2BHK ₹75L bola tha, par possession tak ₹80L pahunch gaya. PLC aur other hidden charges pe kitna discount expect karna chahiye? Kya 5-10% off milta hai ya yeh sab sirf bolne ki baatein hain?