Price Guide
Understanding what makes a koi valuable — and how our AI estimates fair market price for every listing on the platform.
AI-Assisted Valuation
When a seller creates a listing, our system analyses the passport details — variety, bloodline, size, age, sex, and breeder — against our growing database of completed sales. The result is a suggested price range with a confidence score.
Sellers are never required to follow the suggestion. The AI range is a reference point, not a ceiling. Exceptional specimens are frequently priced above estimate.
A Kohaku from the Dainichi Gosuke bloodline commands a significant premium over an unknown-origin fish of the same size. Pedigree is price.
Larger, mature fish (Sansai and above) are generally more valuable, but the relationship is non-linear — exceptional Tosai can exceed mediocre Gosai specimens.
Pattern symmetry, hi quality, and absence of defects are critical. Our AI model is being trained on expert breeder grading data to capture these nuances.
Top Japanese breeders — Dainichi, Momotaro, Sakai — carry a premium. Breeder and farm name is weighted in every valuation.
We index recent sales data for comparable fish (variety, size band, bloodline) to anchor estimates in real market prices.
Japanese-origin fish typically carry a 20–40% premium over domestically bred fish. Import and quarantine costs are factored in for international buyers.
Young tosai, common bloodlines, domestic breeders. Great entry point for new hobbyists.
Quality domestic or import fish with good pattern, known breeders. The most liquid segment.
Japanese-origin from reputable farms, nisai–yonsai, excellent pattern and skin quality.
Grand Champion-lineage, Dainichi or Sakai origin, exceptional specimens. Investor grade.
Disclaimer: AI valuation estimates are indicative only. KOI Market does not guarantee any listing will sell at the suggested range. Final price is always agreed between buyer and seller.