Good quality old ones are even more expensive and if not, the hard edge bonded to the softer strong metal may have been sharpened away.
In any case, go to big flea markets that have people with that kind of stuff - Canton Texas First Saturday Sale for example (not one where used video games are a feature) and be prepared for a lot of walking. If you see someone with old tools, tell them you are looking for basic woodworking tools in usable condition and they don't need handles. They may pull stuff out or direct you to another vendor that has some. I got a couple of good cold chisels for free one time.