Hi,
I've been lurking here for a while and I thought I'd enter in a bit.
I have two knives that have exceeded my expectations. Both are "cheap" knives. The first knife is a Sheffield liner-lock folder that came as part of a 3 piece multi-tool set that my daughters bought for fathers day about 5 years ago. It's 4" closed with a 3 1/8" blade. The multi-tools were not very good, but this knife has taken a real beating. It holds it's edge very well, tolerating cutting 12ga copper wire with little complaint. I've used it to dress, skin and cut up several deer, numerous pheasants, ducks and geese. It has become the knife I carry when I expect hard work from a blade. Cost: about $9.99US for the set. So let's call it a $2 knife.
The second knife is a simple little Okapi 1979E. I've only had it for a month, but it's become the knife you'll find in my pocket. Light weight, easy on my pocket, and all I really need for those little mundane everyday tasks. Plus, I like the "oldness" of the design.
While I have owned better known knives, (Schrade, Case, Buck). They have both surprised me with a value and usefulness that far exceeds my expectations.
dalee