Hello, are you interested in the apartment I have listed?
Yes I am but the price is a bit high. Any wiggle room in the price?
Well, it's a beautiful apartment and very convenient. However, I am willing to listen to your offer and see if we can come to an agreement.
Would you offer the unit for $2000?
Best I can do is come down to 2500 even. I have expenses I have to cover, and I've put a lot of work into it before putting it on the market. 
That seems reasonable. How about $2400? I would really like to rent this unit. However, I do wish it came with a private parking spot instead of off-street parking, but I am still very interested if you can come down to $2400.
I think I can live with that. I accept your offer of $2,400. Let's set up a meeting to get the ball rolling.
Great!