Rentals are insane!

I've been searching for flatmates around HSR & Koramangala and areas near by Bellandur. I got to see some decent listings. But, what is actually going here! 40k for a 1bhk or 75-90k for a 2/3 BHK. Rental here aren't seem to be practical. What do the landlords thinks of themselves. Just because they own a property they can ask whatever they want huh! 4.8lakhs as a deposit? Who in the earth is willing to get a rental house for 70k.