Noida Extension 3BHK upgrade: Is the current price hike real?

₹1.5 Cr for a 3BHK in Sector 150 — is this price real or just hype? I'm currently in a 2BHK in Sector 137 and thinking of upgrading, but prices seem crazy high now. Already have a home loan, so EMI will be a big jump. Builders like Godrej and ATS in 150 are quoting insane rates for their projects. Is this price rise sustainable, ya fir correction aayega? Honestly, not sure if this premium is justified for a 3BHK. What's the real scene with all-in costs? PLC, parking, maintenance — sab milake kitna difference aata hai from the advertised price? Also, for max appreciation in the next 2 years, which areas should I look at besides 150? Yamuna Expressway micro-markets or maybe even Swarn Nagri? What does the community think?