The price of Titleist Pro V1 golf balls can vary depending on the retailer, region, and quantity purchased. Generally, a sleeve of three Pro V1 golf balls can cost around $12 to $15, while a dozen (12) Pro V1 golf balls can cost anywhere from $40 to $60 or more. The cost per ball for a dozen Pro V1s ranges from around $3 to $5. It's important to note that prices may vary based on special promotions, sales, or availability and may be higher in some regions or countries due to shipping and import costs.