Greater Noida investors, what's your take on spot discounts?

My budget is set for a 2BHK in Greater Noida, aiming for max value. I'm looking at places like Sector 16, maybe Metropark. Builders often offer "spot discounts" but honestly, I'm not sure if they're real. Kya lagta hai, can we actually get a decent 5-10% off on a ₹70L-₹80L 2BHK? Or is secondary market better for real negotiation? Brokers claim they get better deals. What's the best way to approach this for good ROI, especially with Jewar Airport coming up?