Realtor Commissions - Negotiable with multiple properties?

[Dan Verteramo]

What is a reasonable relator commission for residential real estate in Massachusetts? I may be relocating and have 2 properties to sell, one single family(my residence) and 1 investment 3 family. Would I be able to negotiate a lower commission if I were to list the 2 properties with the same brokerage company? The properties are in different towns within the same state and I am looking for creative ways to maximize profits. Currently, the listing agents are requesting 5% for each property. Is there a way to package this so that I could reduce commissions? Would it be reasonable to ask for 4% for each property?Any advice/direction would be appreciated.