Spot discount reality in Gurugram, what's real?

Sector 31 — just checked out a 2BHK there, around ₹1.8 Cr. ST. PATRICKS REALITY PVT. LTD. was offering some 'spot discount' if I booked right away. Honestly, I'm not sure how much of that is real. Is there actually room to negotiate beyond these so-called spot offers in Gurugram? My parents keep saying builders don't budge much, but I feel like there must be some wiggle room, especially with prices rising so fast. For a 2BHK, what's a realistic discount percentage one can expect? Or is it just the PLC and other charges they play with? Any negotiation hacks?