I'm going to go after this thread from a different angle than most people in here due to my Psychology background. So bear with me, hopefully, while I maneuver through something new (at least to you anyways).
To start off with, you made it very clear that you are an all in, one intense hobby focused guy which can create some sort of linear perspective on collecting knives. Then suddenly the day of frustration of trying to chase something down that refuses to "obey" your very firm linear focus made you frustrated. And you suddenly decided to back off and sell off the knives.
I think I know why.
Due to your type of personality, the only way your personality can reset itself back to even ground after such a hard chase is to back off and get back on high ground in order to see the horizon. Only by selling your knives off does it help you back to high ground with no materialistic ties can you see where you want to go next which is why you called it "freeing". In that same regard, it also helps you reset your expectations and interests in knives for future dates which is why you're coming here seeking new advices and new ways of looking at things because you're now allowing yourself to reform your hunting strategies since you're back at "base camp". Would you even at all reform or readjust your strategies out in the field during the heat of a hunt? You're not that type of person.
As it is with all personalities in humanity worldwide, it of course comes with pro and con in how it handles learning from its own experience produced by it's own actions. In your situation, the Con of course lies in the fact that you're hard to change once you take action and/or in the heat of any moments, being single focused as you said you are. The pro is that once you back off, take a breather, let go of old tools, do you actually learn from your active experience that you just partake during a course of actions regardless on how long it took. Having the ability to step back and let go of something that does not work anymore or being able to let go of old tools that no longer simulates fresh way of thinking, solution buildings, providing simulations to life of actions, is a very strong mark of a healthy personality because it shows flexibility in the course of growing towards a desired experience, an end goal. Would you have been able to obtain the same measure of result should you have held onto your knives with stubborn abandon? I would be more inclined to think not.
Lastly, by stepping back, you were able to take serious notes that you had still more room in your life to appreciate the finer points of collecting knives and the "why" behind it. You are an action guy and by the action of letting things go have you allowed yourself to reduce your materialistic baggages (both physically and mentally) which also allowed you to formulate a future plan going forward. By coming here and talking with your fellow knife brethrens, you were also helping yourself gain more ideas for the action you are hoping to do because if you don't ask, you wont know the very idea of certain actions could exist such as going to knife shows and observing other hunters going after "whales" in action.
There is nothing unusual in your choice of action starting this thread to me. But as you can see, it's uncommon. But just because it's uncommon doesn't mean it's not the right thing to do because based on who you are, it is the right thing to do.
Hope I helped a wee tad.