I think *most* folks start out with quantity over quality. They try different brands, locks, blade shapes, steel, etc. As you learn what you like or don't like, you start refining from there. At some point, people start to spend more $ on knives and thin out out ones they don't carry much anymore.
The most I ever spent on a knife is around $140 or so. Due to poor financial decisions in my past (started my own business and failed), I try to save as much as possible and reload my retirement fund. I am content with my ZT 350, Delica 4 FFG, SAK or LM, or an Ontario Rat 1 in D2. I have no desire for a Sebenza, Shiro, custom, etc. I found what works for me, you need to find what works for you.