Hi Rebecca, buying a home involves a lot more than just negotiating a price although that alone can possibly be worth more than the commission. Did your Realtor do/discuss a comparable market analysis/value prior to you writing the offer? Did you specifically ask her to show you the home as a favor with no further involvement? Did she explain Agency Law Representation options up front? There are many aspects and nuances in the process that could become pitfalls and risks that good professional experienced representation can avoid/overcome. Remember that your Realtor represents you and your interests while the builder/seller is only looking out for their own interests. You certainly have the right to "go it alone" (maybe not in this case since there is something that the builder signed already as you mentioned?). How experienced are you, how often have you done this and when was the last time compared to someone that does this for a living? I agree with the comments already given, you did get the Realtor involved and that has implications, although if you are not satisfied with the service you are getting you do have the right to seek other help or go it alone (you said you did not sign any agency agreement). Again, it might be too late on this house. The builder is not bound by the Realtor Code of Ethics (assuming he's not a licensed Broker), but in my opinion, it is less than reputable for him to sign an agreement with the Realtor then tell you that you could get the home for less without her.