Greg, I have to back you up on the value of knowledge. I've been a technical trainer for the telecommunications industry as well as a salesman, and I can tell you that the two most valuable commodities you can give a client are knowledge and time.

There is an old story about a large chemical plant that was having an issue, so they called in a consultant. After spending a couple of hours walking around, he pointed to a pipe and said they needed a 8 inch check valve on that line. After completing the work, the consultant presented them with a bill for $20,000. The buyer balked at the price and demanded that the bill be itemized. He did so as follows:

1 Eight inch check valve w/ installation $600
Knowing where to put the check valve $19,400