if you have the time have you attempted hosting/selling yourself? I know it sounds ridiculous at mentioning but I purchased my current home without any real estate agents, we did work through lawyers and there were fees there... but likely minimal (I paid under $1500) and I actually enjoyed working directly with lawyers rather than having real estate agents inbetween, this would be my prefered method if I were to sell/purchase again.
In the US the title company does _all_ the actual work in a sale. And takes _all_ the liability. Everyone else is a middle man.
I'm guessing it might be very similar in actual dollars, as there are a number of cities in the US where you can buy a house for $150,000. 3% would be $4,500 USD for a real estate commission. Then the broker would keep a good part. The agent might get $3,000 of it.