The most expensive Cypress variety is the "Cupressus macrocarpa," also known as the Monterey Cypress. This particular species is highly valued for its durability, versatility, and aesthetic appeal. The Monterey Cypress commands a premium price due to its limited availability and the demand for its unique, pyramidal shape and dense foliage. According to the American Hardwood Export Council, the Monterey Cypress is one of the most expensive cypress species, with prices reaching up to $5,000 per cubic meter in the international market. The rarity of this tree, combined with its exceptional qualities, makes it a sought-after choice for high-end landscaping and architectural projects.