Noida new bookings pe negotiation kitna possible hai?

Fed up of paying EMI for someone else's asset, finally taking the plunge in Noida. Looking at Irish Infrastructure in Sector 80, but confused about pricing. Builder bolta hai fixed price for pre-launch, but is that really the best deal? How much negotiation is possible on new bookings, like, kitna discount expect kar sakte hain? Ya secondary market better hai for deals?