Delhi builders' 'fixed price' is a myth – change my mind.

Spent the whole Sunday checking out options in Aya Nagar, saw a couple of Shalimar Corp projects. Honestly, the 3BHK prices are hitting ₹1.8 Cr, which is way above my ₹1.5 Cr budget. My parents keep saying negotiate hard, but builders seem firm. Does price negotiation actually work in Delhi? Kitna realistically knock off kar sakte hain? And what about all the hidden charges? PLC, floor rise, parking, club fees – I'm worried about the total cost of acquisition. Are there any charges that only pop up near possession time? Should I look at secondary market deals instead? Matlab, can you negotiate more on resale properties than new ones? Any advice on how to spot underpriced assets in this market?