Secondary market deals aren't always the bargain

Secondary market deals aren't always the bargain people think. My kids have moved out, so I'm selling our big house and looking for a smaller 2BHK in a good society around Mohali or maybe Saini Majra. Thought resale would be easier, more negotiable. But X Ecosystem Solutions Llp projects, even older ones, seem to hold their price quite firm. People are asking ₹85L-₹1Cr for a 2BHK, sometimes with crazy floor-rise premiums. I thought resale meant more flexibility on price. Am I wrong? Are there still hidden costs in resale flats that aren't obvious until later? What's the real ground reality for negotiating in secondary sales in Chandigarh?