Amazon offers Prime members the Fruit of the Loom Men's Basic Briefs 7-Pack in White for $7.05 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's a buck under our August mention, the best deal now by $2, and the lowest total price we've seen. They're available in sizes S to 3XL.
Target has it for the same price in-cart with free shipping for everyone.