Rohini 2BHK: Real cost aur negotiation pe confusion

₹45k rent every month, saach mein ab thak gaya hoon. Finally taking the plunge into buying, looking at a 2BHK in Sector 25 Rohini, maybe a DDA project. Broker quoted ₹95 lakh. Delhi mein negotiation kitna work karta hai? Kitna off kara sakte hain realistically? Also, all-in cost ka kya scene hai? Stamp duty, registration ke alawa aur kya hidden charges lagte hain jo baad mein aate hain? Don't want last-minute surprises. Kya total estimate rakhu for a 2BHK?