Overall Koi are the most expensive of the ornamental fish. Fish that win the All Japan Show, the largest koi show in the world, regularly sell for over a $100K.
A couple of fish that have won the British Koi Keepers Assc were also over $100K.
Back in 2005 I got ''recruited'' to help a very wealthy koi owner in Florida bag and move 7 fish to the show in Orlando, since he had no idea what he was doing. The purchase price of the 7 fish was just over $400K.
When he got to the show a dealer delievered a new fish for him (pictured) that was $72K....when money is not an object
Don't I wish I was in that tax bracket, my most expensive fish was only $2000