Also, my own on-topic answer for the question in the OP is that my range would be between $50-$100. I have purchased several knives in that range recently (Rosecraft slipjoints) that are A. FANTASTIC quality, and yet, entirely usable. I have already scratched the blade on one of my Jacks because I had some bacon grease I wanted to toss and so I cut the top off a can with it. Edge took no damage whatsoever. RC does their slipjoints in D2, and it's the business. However, for modern locking knives, I've purchased many used Cold Steels here on the Exchange and even on Ebay for under a hundred dollars that have seen outdoors camping use with zero issues. Cold Steel S35vn is VERY well done, and as for their AUS10, I mean...a large Voyager is like $53. If you can't do every single knife task in your life with that knife, you're doing something wrong.
So, for me, I think there are a ton of budget friendly knives on the market today, and we're spoiled for choice more now than at any time in the history of the hobby. It's easy to see pics posted by many of us and think "Man, I need to spend $500 or else people will think I'm cheap/broke/not a knife guy/etc. That's false.
You post up an inexpensive knife that has seen some use in one of these threads and I see it, I'll smash that Like button every time. Nothing wrong with an inexpensive knife that works.
Signed, a guy with a collection of both expensive and inexpensive knives, and I love all my sharp children dearly