Landlord ne phir rent badha diya, finally buying

Honestly, I thought buying property in Delhi would be straightforward after years of renting. Landlord ne phir rent badha diya, toh I'm finally taking the plunge. I'm looking at Dallupura, and prices for a decent 2BHK are like ₹90L-₹1Cr. Itna zyada lag raha hai. But I heard from a broker ki kuch projects mein negotiation ka scope hota hai, especially agar builder ko quick cash chahiye. Is this true, ya bas sales talk hai? What about hidden costs besides stamp duty and registration? Hope this helps someone else navigating this market.