The real negotiation leverage: Resale market secrets in Faridabad?

Can you actually negotiate more on resale flats in Faridabad compared to new projects? I'm in a 2BHK in Sector 35, looking for a 3BHK. New builders like Goyal Estate Agency toh kuch discount nahi de rahe. Resale mein kitna margin milta hai? Is it really better for negotiation, ya sirf time waste hai?