Good article here. Choosing a knife
Every prepper/zombie hunter worth his salt should have an assortment of good blades for various tasks and is not the place to scrimp.
A good rule of thumb for buying a knife: If price is the only questions, then the answer is going to suck.
Before buying a blade, do some thinking and find out what you need it for, or for what purpose you are getting it.
You can get a big Rambo looking blade that will work great for batoning wood for a fire, hacking through brush or slaying that zombie that got too close, but for cleaning an animal, or getting a splinter out of a finger, it just won't do.
I am in no way associated with this site and some of the descriptions are a bit crude, but they have some very high end blades.