 The price peaked in 1990 at $34 per kilogram when a typical 350 pound fish sold for around $10,000.As of 2008, bluefin was selling for $23 a kilogram.The drop in value was due to the drop in the Japanese market, an increase in supply from northern bluefin tuna from the Mediterranean, and more and more tuna being stored (tuna frozen with the special "flash" method can be kept for up to a year with no perceivable change in taste).