I suggest the actual price that is paid for any item, including that bonsai or the shears, is what the seller is willing to accept and the buyer is willing to pay. It will never be one penny more or one penny less. That is the only thing that ever determines value.
Concerning shears, bonsai or pots by a master craft person:
"Quality is never an accident; it is always the result of high intention, sincere effort, intelligent direction and skillful execution; it represents the wise choice of many alternatives, the cumulative experience of many masters of craftsmanship. Quality also marks the search for an ideal after necessity has been satisfied and mere usefulness achieved." ~ John Ruskin
Finally, there are some people who will pay very large amounts of money just because they have a special attraction, affinity or appreciation for certain objects or traditions. Back in the day, I collected antique woodworking tools. I did it, not to use them, rather because of my admiration of the craft-persons who originally used them. There are many who might call that hobby foolish or a waste of money, just as many might choose to not spend $35,000 on shears despite the tradition and craftsmanship that brought them into existence.
The pots I saw at the last Kokofu were beautiful, but I have no interest in a $250,000 pot. I just can't appreciate it the way it deserves. Yet, I'm very glad someone does and is willing to hold that pot in trust for all of us.