The general thing that people find both in pricing products and in pricing services is that at the low end of the scale you deal with people who perceive less value from you, less value from your offering, and have more and more unreasonable demands. Like if you’re writing iPhone apps, you’ll receive reviews like “This 99 cent flashlight app didn’t do my taxes, one star!”
That particular client was from my earlier college days of starting out in freelancing. They didn't give me any real issues after that point, but yes, they were not the ideal client to what I would want now :)
Patio11 also has some great articles, so I have to agree with your link.
It sounds like you might have the wrong kind of client. I can only recommend reading this great piece by fellow HNer patio11:
http://www.kalzumeus.com/2012/09/21/ramit-sethi-and-patrick-...
It's full of gems such as:
The general thing that people find both in pricing products and in pricing services is that at the low end of the scale you deal with people who perceive less value from you, less value from your offering, and have more and more unreasonable demands. Like if you’re writing iPhone apps, you’ll receive reviews like “This 99 cent flashlight app didn’t do my taxes, one star!”