Given that I consider all cyclists potential friends, it can be hard to say to no during negotiation. One Vietnamese friend who doesn't even ride talked me down $100 on a $500 using ridiculous haggling tactics ("You give me this bike for $200"). But I thought it was good preparation for the rest of the season. But I was proud of myself when I told one customer "No". I secured his team a great deal from one of our brands, below cost pricing. Anyone was welcome to build their bikes themselves, but I charged them $200 for assembly, which includes lifetime service. This price might not be competitive for bike builds, but considering that I brokered this deal with our rep and even organized a demo day to try out these bikes, I think it is fair. Well one of the team members, who ordered 2 bikes worth more than $5000, wanted to renegotiate the build price. I politely declined, stating the great deal he received. I don't think he was 100% happy, but he accepted my argument. I think it is possible to say no politely.