The drop point 13OT Trailblazer was produced for only three years, so they are not very common, though not rare yet in NIB condition. If fact, new ones are more often seen than used ones. Together with the low production, that points to poor sales of the pattern, so it evidently was not a popular offering at the time. The companion clip point 14OT Timberline suffered a similar fate, produced for four years (1978-1981). Again, more often found new in the box than used.
Codger