Greater Noida investors: Best value pockets remaining?

Since January, I've been researching Greater Noida for investment, living in Dubai makes ground research tough. Prices have definitely shot up, especially near Jewar Airport. I'm wondering, are there still any 'price correction zones' left, maybe around Sarai Sadar or the Yamuna Expressway micro-markets, where one can find good value? Builders like Manglam Group, do they have any actual negotiation scope, ya sab fixed hai? Also, are brokers giving better deals than direct builder channels these days?