What is the Average Cost of Koi Fish? Average Koi Fish Price

The price of Koi Fish varies depending on their size and the quantity purchased.. A good price for 4-inch Koi regularly sell for $29.40 each with a reduction in price for buying ten or more. For a five to six inch mix of varieties would cost about $25.00 each for ten and a single price of $36.75. Six to eight inch yearlings cost $57.75 each reducing to $38 each for a mix of six Koi while eight to ten inch breeders cost $105 each.