The rental market is getting tougher by the day, inventory on rentals is low and competition for them is high.
If you factor in how many of the rentals are being offered where the landlord is willing to pay or split the commission that would add to the affordability factor for many folks.
If a rental is listed with an agency and the landlord is not willing to at least split the agents commission, take a pass on the property. Chances are the landlord will be a cheap hard case when it comes to fixing and addressing issues with you and the apartment that may come up in the future.
To answer your question with any specificity, you'll need to add other factors of what your looking for in a rental such as # beds, baths garage important or not etc.