If you just need a knife, the world is awash with plenty of good options. This is like...the golden age of knife collecting. Mind boggling array of choices.
If ya' just gots ta have that S&W logo, Taylor Cutlery big bad! Blackie Collins good! Ebay will be your friend. Speaking in perhaps overly broad terms. the older knives that were decent tend to have mirror finishes. They do not have serrations, thumb studs, or any kinda one hand opening. Karambits, tanto blades, etc. are not the ones to look at. I was shopping for myself just yesterday, and there are lots of good options, if that's the path you choose. My wife had one of the larger lockbacks that was made in the late 70's back in 1993 when we first started dating. We had the best Summer we've ever known while hanging between childhood and adulthood. That knife helped make alot of kindling, tent stakes, hot dog sticks, cleaned alot of fish, etc. that summer. There's knives made now that are better made by every concievable metric, but just because there's brand new metallurgy, design, etc. doesn't mean the old stuff has gone out of date and quit working.