I get your point for sure. The problem I have is you value fish from an unrealistic and one-sided standpoint IMHO. A fish, any fish has a certain minimum value based on market price, timing, demand, and most importantly the costs that go into producing that fish. Period! Business 101. This is where it gets complicated when the business value and the market/artistic value meet.
That fish you speak of above is a great example. To the breeder that fish could be priceless with certain considerations. Timing is everything. At that point in time, if that is the closest fish he has towards his goal he would be foolish to sell it at all if he wanted to continue his quest. So, at that point the fish will be more valuable (to the breeder) because it is the closest thing he has towards his goal at the time. This is where market price has little to do with value. So, this means if someone wanted to purchase it at that time, they would most likely pay what it is worth to the breeder, and market value would not even be considered. Now at some point in time, he may have a better one, and it is at this point the value of the first fish will fall, and so on and so on up the line until he reaches his goal. This holds true with ALL Koi. As time goes on the value of an individual fish may drop due to improvements in the overall breeding of that particular variety. Look at any high end fish in any variety today, and compare it to one s produced 20 years ago. Big differences. I don't agree with your 70 year analogy. From a scientific geniology standpoint you may be correct I don't know, but from an aesthestics standpoint you are way off.
I disagree with these "restaurant ctritic" critiques and value assessments . I have always had issues with folks that claim to be the experts from books, and have little to no practical experience, but yet somehow end up critiqing the folks on the forefront and in the trenches. They have no place doing value assessments. Most critics either failed at the business, or have had very little hands on experience with that business.
No doubt you are one of the most intelligent folks I am aware of in the industry for sure, and I can tell you do a LOT of reading. Yes, and talking over the years with all those Japanese breeders will enhance this further, but I am afraid it is not the same as actually doing it. As a business, as an art, and as a life, we live, eat and breath koi, and no book or conversation will ever replace hands on experience. You call that fish above junk, but it may just be one link in a chain that leads to a very valuable fish.