Noida Ext flat ka final bill — itna kaise badh gaya?

₹78 lakh ka flat, but final cost ₹90 lakh cross kar gaya. Just moved into my 2BHK in Sunpura last month, aur abhi bhi hidden charges ka shock lag raha hai. Builder ne initially sirf basic price bataya tha. Koi batata hi nahi ki stamp duty, registration, aur PLC ka kitna add hota hai. My builder, Msx Developers, was okay but negotiation didn't really work beyond a small discount. Pata nahi kitna aur adjust kar sakte the. Kya sabke saath aisa hota hai ki possession ke time itne extra costs aate hain? Especially parking charges aur electricity meter fees toh bilkul unexpected the. How much did you guys actually manage to negotiate off the final price? I feel like I could've saved more.