Hyderabad spot discounts are rarely real

Fed up of renting for 7 years now, I'm finally looking to buy my own place in Hyderabad. Landlord ne rent phir badha diya, yaar. I'm checking out projects near Hitech City Junction, like Salarpuria Sattva. Builder sales teams talk about 'spot discounts' if you book immediately. Is this just a sales gimmick, or can you actually get a significant discount? Kitna expect kar sakte hain, like 5% ya 10%? Has anyone managed to get a real spot discount recently? Kya tricks hain to negotiate better?