CLAIM: "You get what you pay for. Anyone charging less is obviously not as good. I, on the other hand, will offer better service and sell your house for more."
True, you generally get what you pay for. The question you need to ask is, "What services am I getting for my money?" You will find that most of the lower-priced or flat-fee agents are offering the exact same services as agents who take a high percentage of the home's value. So this brings the question right back to them: "What MORE will you do for such a huge pile of money?"