Mohali 3BHK resale confusion: ROI on floor premium?

₹90 lakh for a 3BHK in Mohali, Sector 70, seems decent, but the secondary market pricing is confusing. I've tracked Chandigarh real estate for years and new projects from builders like Omaxe ya Godrej mein negotiation space kam hi milta hai. Builders usually have fixed rates for their inventory. But for resale properties, especially in sectors like 69 ya Aerocity, kitna negotiation possible hai? My experience suggests motivated sellers in the secondary market often offer better deals. Is it standard to expect 5-7% off the asking price there? Also, this floor-rise premium, as an investor, does it add any real ROI or rental yield advantage? Ya sirf ek cost hai? I'm looking for assets with maximum value. Any insights on broker tactics for secondary market deals would be helpful.