Ghaziabad buyers: What's the real all-in cost?

₹78 lakh for a 2BHK in Sahibabad Industrial Area from MNG Realtech LLP looks decent. Is there much room to negotiate on this price in Ghaziabad, or are builders pretty firm right now? Also, beyond stamp duty, what hidden charges should I really watch for? Don't want any nasty surprises at possession, honestly.