Stuck on 'spot discounts' for a compact flat

Selling our old house is taking longer than expected, and now I'm worried about finding something compact in Noida Extension. Kids have moved out, toh bas ek manageable 2BHK chahiye, hospital ke paas. I'm looking at Urbtech projects in Sector 24. Brokers are quoting around ₹85L for a 2BHK, par then they push for 'spot discounts' if I book immediately. Yeh genuine price drop hai ya bas sales tactic? Bohot pressure lag raha hai. Also, hidden charges jaise PLC, maintenance advance... yeh sab add up ho jaate hain. Final price pe kitna negotiation possible hai? Any tips on getting a better deal ya last-minute surprises avoid karne ke liye?