Ends 11/7. Groupon has 4 pairs of Michael Adams Boxer Briefs (black/gray/navy/white) for $15 with free shipping. 100% cotton boxer briefs have a relaxed fit and are available in sizes S to XL. $20+ on other sites.
eBay has a 6-Pack of Knocker Seamless Compression Men's Boxer Briefs for $13 with free shipping