Considered a line for my commission site: You're not buying a service. You're buying a result. Something about it didn't sound right.
Ran that by a couple of friends. One of them replied "If you put up high quality pictures. You don't have to say anything. Your work will speak for itself." Replied "Thanks and that is a great idea" and abandoned the line. Then it occured to me. My clients can buy results while I provide them excellent service.