There are brokers with low overhead (including myself) who can charge less commission to the seller to get more listings. However, lowering the commission too much will turn away agents who won't bring their buyers by if the pay isn't there. I believe California commissions average 3% but those properties sell for more than here in the Midwest (at least they used too!).

John, This is clearly a violation of antitrust. I would recommend that what you decide to charge is your business and only your business, not to be discussed openly or with other agents or brokers. There is no average, normal, or standard. Antitrust Quiz: http://www.realtor.org/rmoquiz2.nsf/antitrustquiz?openform