GearXS via eBay offers two pairs of Men's Merino Wool Blend Thermal Insulated Socks for $5.99 with free shipping. That's $3 below the best price we could find for two pairs of similar socks, although we saw them for a buck less in November. They're designed for shoe sizes 10-13.

Of note, they're also available in kids' size for $4.99 with free shipping. That's $9 under the best deal we could find for this quantity of similar kids' socks elsewhere.