adidas offers its adidas Men's Ultimate Training Shirt in Maroon or Rich Green for $11.99 with free shipping. That's $13 off and the lowest total price we could find. It's available in sizes S to XL, although not in all size/color combinations.
DealGenius offers this Hanes Men's Tag-Free Crew Neck T-Shirt 6-Pack for $17.99 with free shipping. That's $2.99 per shirt and the lowest total price we could find, although we saw it for $5 less in July. (It's a current price low by $2.) These relaxed-fit, 100% cotton T-shirts are available in sizes S and XL only. Each order ships with two blue, two green, and two brown T-shirts.