Resale in Rohini offers better negotiation leverage

Checked out resale options in Sector 6 Rohini this week. Matlab, from my experience, secondary market deals mein negotiation scope bahut zyada hota hai compared to new projects from builders like Rohini Properties. Builders often have fixed prices, but resale mein owner se direct baat hoti hai. Kya lagta hai, hidden charges resale mein kam hote hain ya utne hi? I'm targeting a good ROI.