Hidden costs & negotiation: What's the real Bangalore property deal?

What's the real deal with all the extra costs in Bangalore property? Honestly, I'm so fed up of renting near Residency Road, landlord raised rent again, so finally taking the plunge. Looking at a 3BHK from Prestige Group, but the listed price feels like just the start. What are the actual hidden charges beyond stamp duty and registration? Like, what about PLC or floor rise? Do they really add up crazy? And does price negotiation actually work with big builders? How much can you realistically knock off from the quoted price?