adidas via eBay has 6-Pair adidas Men's or Women's Socks (various) on sale for $14 - 30% in cart discount = $9.80. Shipping is free.
community member daisybeetle for finding this deal.
Note, must add to cart to see discounted price.
Examples (prices after in-cart discount)Men's6-Pair adidas Athletic Crew Socks (navy) $9.806-Pair adidas Superlite Linear Super-No-Show Socks (black or white) $9.806-Pair adidas Originals Trefoil Ankle Socks $9.806-Pair adidas Superlite Ankle Socks (white & grey) $9.806-Pair adidas Superlite Ankle Socks (black) $9.80More
Women's6-Pair adidas Athletic No-Show Socks $9.806-Pair adidas Athletic Quarter Socks (white) $9.806-Pair adidas Originals Trefoil Superlite No-Show Socks (multicolor) $9.80More