Bangalore property: What's the real discount after all costs?

Did a site visit to FORTUNE PRIMERO LLP's new project in Srinivasa Nagar last weekend. They're quoting around 1.3 Cr for a 2BHK, which seems a bit high for the area. From my experience, builders usually have some wiggle room, but kitna realistically expect kar sakte hain? I'm targeting at least 5-7% off the quoted price, but not sure if that's possible nowadays in Bangalore. Is it just the base price, ya total cost mein bhi negotiation possible hai? Also, they're pushing a construction-linked payment plan. Is it smarter to go for that ya better to negotiate a bigger upfront discount with a higher down payment? I've seen so many hidden charges pop up at possession, like increased PLC ya unexpected maintenance fund demands. What are the common hidden costs one should watch out for with new projects? Aur investor perspective se, what negotiation tactics actually work for maximizing ROI?