The most expensive fingerprint citrus variety is the Kishu Mandarin. This variety, known for its distinct fingerprint-like pattern on its skin, commands a premium price due to its limited availability and unique flavor profile. According to a report by the California Citrus Mutual, the average price per pound for Kishu Mandarins in the United States is around $5.00, which is significantly higher than the average price for other citrus varieties like oranges or grapefruits. The rarity of the Kishu Mandarin, combined with its high demand among consumers for its distinctive taste and appearance, contributes to its elevated price. Additionally, the cultivation process for Kishu Mandarins is more labor-intensive, requiring careful handling and harvesting, which further adds to the cost.