Gurgaon property hunt: What am I missing?

Honestly, I'm completely lost trying to figure out property costs in Gurgaon. I'm looking at a 2BHK around Prem Nagar, maybe Golf Course Extension, budget around ₹1.8 Cr. Builders like C S Realty are showing some pre-launch rates, saying it's the best deal. But I'm skeptical. Is that 'early-bird' pricing actually a discount, or just a marketing trick before they add all the PLCs and floor-rise premiums? My main concern is the final, all-inclusive price. Does negotiation even work here? I heard you can maybe knock off 2-3% on the sticker price, but then they hit you with stamp duty, registration, parking, maintenance, and all these unexpected charges at possession. Are there any specific hidden costs I should watch out for? Not sure if I'm factoring everything in, and don't want any surprises. What's the realistic total cost of acquisition after everything?