The only way that makes sense is if they charge a flat monthly fee but nothing for finding a renter. 

I believe so, Jessica - this is where 3rd party processor based digital platforms fall flat.

Some have higher flat fees.

.: Quote from @Brandon Brown: I am considering switching to a heat pump with an electric heat strip for supplemental heating in our two-flat building, with plans to add a third unit in the future.

However, what I admire is their character.  

This building was built and 1924 and has a lot of old character.

But when listing my rentals in DFW, I've been quoted flat rates by several R/E agents.

This work builds character.

For example, an agent would collect a reduced commission, flat transaction fee, or no commission if the buyer sources an off-market deal directly.In your case, if you'd like to compensate your agent, you can include it in the loan.

My ceilings are always bright while flat paint so that is always easy.