Commission does vary. The typical is 6% and half goes to the selling agent. However, if the property is very inexpensive, there is sometimes a minimum a brokerage could charge, which sometimes could be up to 10%. Commission can be negotiated if there is good reasoning. It is always best to express concerns up front and be open and honest. Most listing agents, if they have a good business model, often invest quite a bit of money into advertising and marketing their listings and their business. For most properties however 6% is about the norm. If the property is vacant land, commercial, or pretty inexpensive, sometimes that may not be the case.