On $290,000 the sales commission would be $7,700 or 2.655%
Agents commission vary and have many factors which include locating of property, services required/offered and agency profile etc.
Commissions normally range from 1% (rare) to 3%, on average agents sales commission would be between 2.2% & 2.6%
I would say that between 2.5% and 3% would be normal for a property sale up to $300k