Duluth Trading Co. offers its Duluth Trading Co. Men's Short-Sleeve Longtail T-Shirts in assorted colors and styles (Pocket Tee in Hunter Green pictured) for $10 plus $6.99 for shipping. That's $10 off list, $5 under our February mention, and the lowest total price we've seen. They're available in sizes S to XXL, although not in all sizes/styles/colors.
Stocking up? Orders of $50 or more qualify for free shipping, meaning you can get five T-shirts for $50 with free shipping.