NRI buying in Rajkot's secondary market — need ground truth

Krishna Kunj mein resale flats dekh raha hoon. I'm based in Dubai, so site visit mushkil hai. Secondary market mein negotiation kitna possible hai, especially for an NRI? Brokers bolte hain ki direct owner se deal better hoti hai, but legal checks ka kya? Also, POA se deal karte time hidden charges kya ho sakte hain? Thinking about a 2BHK around 60-70L.