As true as that sounds, you have to think about the future. Word of mouth advertising travels FAST, and before you know it, you'll have tons of people coming to you for a price, not a service. When you quote them something else, they'll be upset. Why? Because as Holden mentioned, they're price shoppers (some are just people who don't know squat about detailing and don't feel it's worth much) and they don't care for understanding the concept of a proper detail. Then you also have to account for those people who will recommend their friends, etc. and when their friends' cars turn out nearly perfect, your services will be questionable.
This is why I always try to find some sort of middle ground. I offer 2 exterior services... 1-step polishing, which I make clear to the client will in most cases not make the paint perfect, but will significantly improve it no matter what, and multi-step polishing, which I explain as the 'as close to perfect as possible" service... this way everyone knows what to expect and what they have to pay for a certain service. I give an exact quote for 1-step over the phone because I know what I'll be doing, but require to see the car before an exact quote on multi-step (I give a range that's about $200 apart)
In short, I guess I'm just trying to warn you that your name is very important in the business, and people talk, A LOT. It might be in your best interest to start off very slow doing high paying high-quality details than being known as the guy who does great work for cheap. Hope all this makes sense