When they realize that nearly anybody could do this, they have to charge really cheaply in order to get any money at all because, let's face it, this isn't great quality. Then when someone hears my pricing, they always tell me, "Oh, I have a guy that will do it for $50!" That's because they're not doing enough to earn even that.
When I go on a job like this, I know what to do to give a real professional look because, well, that is what I do. This is what I do:
Much more visually appealing, better vertical lines (for those architects out there), more detail shown.
*Note: Both of these images were re-sized for web purposes.