Edge knives were a German import in, I think, the 80s....maybe into the 90s.
While they were a good knife, values are low.
I am guessing, but I suspect yours wouldn't sell for any more than $40-$50. They are not a collectible. Yet, at least.
Wisdom is the ability to make good choices.
Heck, bad choices have given me some of the best times of my life!