Amazon has the 6-Pair Amazon Essentials Men's Performance Cotton Cushioned Breathable Athletic No-Show Sports Socks (Grey/White, size 13-15) for $4.72 - 25% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $3.30 with free shipping on $35+ or with Prime. The 8-12 size is $4.46 after coupon, S&S as well.