Amazon offers Prime members the Hanes Men's Briefs 7-Pack
in White for $7.74
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $5.48.) That's the lowest total price we could find by $9. They're available in sizes S and L
Note that some sizes are backordered until October 2, but can still be ordered at this price for delivery when available.