At Finish Line, buy one Finish Line Men's Low-Cut Socks 3-Pack in five styles (Black/Grey/Red pictured) for $2.99 and get a second pack of equal value for free. (You must add both packs to cart as the discount is reflected in-cart.) Opt for in-store pickup to avoid the $8.48 shipping fee. (Stock may vary by ZIP code.) At $0.50 per pair, that's a $2 drop from yesterday's mention for these styles, $14 off, and the lowest total price we could find. They fit men's shoe sizes 10 to 13.
Note that other styles are still available for $4.99 with the buy one, get one offer.