What makes koi so expensive!?

Question

they are like 4-8 dollars when they are 3 inches lnog and when they are like 1ft and 6in they are like 5,000 dollars! what makes them so expensive they stay very healthy and are popular too!

Answer 1

Because it takes a good amount of time and a LOT of space to raise them.

Answer 2

koi fish can sty out of the water for a couple of houres  

Answer 3

supply and demand its simple. certain species are more rare than others