CGHS Classic Apartments: What's the real ROI?

CGHS Group Classic Apartments keeps coming up every time I shortlist something in Gurgaon. I've bought a couple of properties before, so I'm really digging into the numbers, not just brochure claims. What's the actual capital appreciation trend been like here over the last few years? My data shows older societies sometimes struggle with resale liquidity, which is a major concern for my exit strategy. For a 3BHK, what's a realistic rental income these days? I'm calculating ROI, and inflated rental figures mess up projections. Also, how active is the secondary market? I don't want my capital stuck long-term. Any seasoned investors here with insights on its true ROI potential over 5-7 years? Trying to avoid a ghost society scenario. Thanks.