Ghaziabad property: Where to find hidden value?

Indraprashtha Yojna keeps coming up every time I shortlist something. I'm so fed up of renting, landlord just hiked it again. Finally taking the plunge, but not sure about current property prices. Are there any genuine price correction zones in Ghaziabad right now, especially near the RRTS corridor? Like for a 2BHK around ₹65L-₹70L. Also, how much negotiation room is there on secondary market deals compared to new projects like Sheoran Buildcon? Is paying for floor rise or PLC actually worth it from an investor's ROI perspective?