Gurugram pre-launch discounts: totally fake, right?

Just finished some serious research on Gurugram properties, especially around Sector 52. I'm based in Dubai, so reliance on online info aur broker calls hi hai. JMS Group ke ek project mein 3BHK dekh raha tha, they're pushing pre-launch offers. Bol rahe hain abhi ₹1.6 Cr ka hai but baad mein definitely upar jayega. Is this pre-launch discount *real* ya bas marketing gimmick? Also, Gurugram mein negotiation kitna possible hai? Brokers bolte hain 'fixed price' but I've heard you can still knock off 5-10% sometimes, especially agar lump sum payment ka option do. Is this true? Aur construction-linked vs down payment plan mein, for an investor, which one makes more sense? I can't do site inspections myself so legal clarity and project delays are a big worry. Any experiences with JMS Group or similar builders on this? What's the real ground truth? Is it worth pushing hard for price drops, yaar?