Sector 4B 2BHK prices are just builder hype.

₹78 lakh for a 2BHK in Sector 4B feels steep, even with the Metro extension nearby. I know the builder's margin game, but is the appreciation really strong enough for this price? What's the real investment potential in 3-5 years? Resale market for a 2BHK is important. Any ground reality on rental demand here?