Chandigarh property ka true cost aur negotiation tips?

Since January I've been shortlisting flats in Chandigarh, mostly 2BHKs near Sector 24C. Builder quotes only show base price. What about stamp duty, registration, PLC, parking, and interiors? Honestly, ye sab add karke total kitna upar jaata hai? Suna hai possession ke time bhi hidden charges aate hain. Koi bata sakta hai kya dekhna chahiye to avoid surprises? My budget is tight, around ₹75-85L, so every lakh counts. Also, negotiation ka kya scene hai? Builders say fixed, but I'm sure kuch toh discount milta hoga. Kitna expect kar sakte hain? Ab samajh nahi aa raha.