I would work for as low as 4% if the house was priced correctly, as I believe many agents would. Agreement on any commission rate gets you the same level of service that customary 6% will get you. The same advertisements, the same IDX access, the same MLS access, the same open houses, the same broker tours, the same craigslist ads, the same Trulia ads, the same Oodle adds, the same signs, the same marketing and advertisement. Period.
What you pay for when contracting with a real estate professional is the result. Bottom line is if an agent takes you on as a client, you become their fiduciary. They have to, by law, act in your best interest at all times. Cutting services is not in your best interest, and you shouldn't work with an agent that isn't going to do everything possible to get your home sold. You pay us for the result. So don't be fooled into thinking that agents who agree to list your home for less than everybody else, are by default planning on spending less money and doing less work. Remember, because there is no agreed upon standard commission rate in New Jersey, there is no such thing as a discount. There is only you, your agent, and whatever terms you come to agreement on.
That being said, I must tell you that the higher the incentive for agents to show your property, the more showings your home will have. Offering 3% to buyer representatives is the best way to get buyers in your home. You might also want to consider a bonus to the selling agent. But at the end of the day, the condition of your home and the competitiveness of how you choose to price it will ultimately be the indicator of whether or not you will have a successful sale.