Chi III Greater Noida: resale market is weirdly hot?

Property prices in Chi III Greater Noida seem inflated on resale. I work in real estate but buying for myself is different. Seeing 2BHK flats quoted way above what new projects were selling for a year back. Is this normal? Anyone else seeing the same? Also, water supply - is it mostly tanker-dependent still? Planning to visit a few societies this weekend. What should I look out for, off the record? Any advice appreciated!