Collected and sold Bowie knives for the last 20 years. Had some that were made in US, China, Pakistan, England, France, etc. Seeing the US made, both in quality and re-sale value, higher than other countries.
Based on current condition and age for the limited pictures, but made in US, these would probably be near the lower end. If this was restored professionally, for example, cleaning up the steel, re-sharpening, might go a little higher (and if a box is available). Unfortunately, new Western knives are made in Asia.