A lot of real estate agents in our markets these days say they are buyer’s agents. (Most are actually designated buyer agents but that is a different issue.)
However in our experience few agents will actually help a buyer negotiate anything other than the purchase contract on the house.
Here is an example of negotiating for the buyer’s benefit with respect closing costs, specifically title company services:
Twice this month listing offices have wanted to close at their related title company. I sometimes have a problem with this which puts me in a position opposite the listing office and the title company.
First, the financial relationship should be disclosed. It rarely is.*