Noida Extension: Remote investor seeking ground truth on deals

Since last Diwali, I've been eyeing properties in Noida Extension, mostly for investment. I'm based in Dubai, so site visits are tough. Online research toh kar raha hoon, but ground reality pata nahi. Builders like Indiabulls Estate dikh rahe hain. Mera main concern hai yeh 'super area' trap. Is there a reliable way to verify carpet area remotely, ya builders ka calculation hamesha inflated hota hai? For a 2BHK around 70-80L, is it better to look at secondary market deals? Suna hai wahan negotiation scope zyada hota hai. And any specific sectors in Noida Extension where there might still be some price correction potential, instead of just the usual high appreciation areas near Jewar? Kya koi underpriced assets abhi bhi mil sakte hain?