TomTop offers the ZK Zukulife Men's Honeycomb Mesh U-shaped Pouch Boxers in several colors (Black pictured) for $8.29 with free shipping. That's $7 off and the lowest price we could find. They're available in Asian sizes L to 5XL. (Be sure to check the size chart further down the page for correlating U.S. sizing.)

Note: This item ships from China and make take up to four weeks to arrive.

Update: The price has dropped to $6.99.