Amazon offers its Prime members the U.S. Polo Assn. Men's Mesh Performance Polo Shirt in Black for $8.81 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $5.48.) That's $11 below the lowest total price we could find for a similar U.S. Polo Assn. shirt elsewhere. It's available in sizes S L and XL.
Note that it's available in White, Red, and Navy for pennies more.