There is no standard commission rate, all is negotiable. Typically is 7% on the 1st $100,000, 2.5% on the balance remaining PLUS tax that the seller pays out if you're asking.
You can always try the discount brokerages: 1% Realty, 2% Realty, etc. There's also OneFlatFee. You can do some of the menial work if you want but unlike the other discount brokerages, you can offer up the typical commission rate to a buyer's realtor and save on the listing end. That should prevent any realtor from not showing your listing to their clients.
Making it an easy sale for a realtor doesn't mean they'll still reduce their commission. It'll give them more reason to but usually it's a little give and take for them to budge. Talk it out with them and failing that, use the discount brokers.
"Harvey Belafonte ain't black. He's just a good looking white guy dipped in caramel. " - Archie Bunker