Sangam Apartment: Resale market ka asli picture?

Just moved into Sangam Apartment last month, and honestly, thoda frustrating ho raha hai. Builder ne brochure mein kuch aur dikhaya tha, but actual maintenance charges bahut high nikle. Meri investment calculation bigad gayi hai. I'm wondering, iska resale market kaisa hai? Secondary market mein liquidity hai kya? Koi aur Sangam Apartment mein recent buyer hai jisko same issues aaye? Ya aapne kaise deal kiya with these hidden costs? I bought for long-term appreciation, but now not sure agar sahi move tha.