Here's a nice survival knife I bought unused but secondhand for $50. I bought it for a solid deal on a fixed blade for backup purposes or to stash, but the SRK has fast become one of my favorite knives.
Big reason: it feels great in hand. The grippy Kraton handle is comfortable and works in whatever grip you need. The just over 8 ounce SRK is light and fast while still be tough. The balance - often an oversight - is pretty much perfect. It shifts and rolls to various grips without trouble. Comparing it to my ESEE-4 and Becker 7, the SRK feels quick and nimble. Good stuff.
This one is in AUS-8A steel, which is a middle-tier but totally serviceable blade steel. Cold Steel makes the SRK in their well regarded San Mai 3, too, for a blade steel upgrade. SRKs in the Carbon V steel, another good one, are no longer made, but can be found second hand.
At 3/16 inches thick, the blade strikes a happy medium between too thick and too thin, and the 6-inch blade length is big without being clumsy. The shape is handy and utilitarian; nice, pointy-point and a good straight edge. I've done some abusive hammering/prying with the tip, and it performed flawlessly - passed that test for sure.

The sheath is actually pretty good, too. Good retention, pretty good materials, lots of mounting options if you won't want to use the removeable belt loop.
For $76 shipped on Amazon, the SRK is a solid, capable and agile survival knife that won't break the bank. I'm favoring it over my ESEE-4 these days, which cost significantly more and was in pretty desperate need of an aftermarket sheath. If you can find a deal on an SRK, jump all over it. I would pickup an uncoated SRK in San Mai 3 if money were no object.
I would only change one thing about the knife - adding an exposed hammering pommel on the end of the handle. The very similar, but pricier Fallkniven knives have this feature, and it's a nice-to-have if you need to do some hammering/smashing or need to baton the tip of the knife into something. Certainly not a dealbreaker though.
I've owned a dozen or so Cold Steel products over the years and handled many more, but none of them have really wowed me like the SRK has. Definitely a knife to take a look at! I know others have spoken well of the SRK, too - if I remember right, it was one of Dave Canterbury's favorites back in his early YouTube days.