Buffalo Men’s Knit Boxers – Costco Sale! by Rhonda January 7, 2022 *UPDATE* 3/26/21. This pack includes 2 black and 1 heather charcoal gray boxers. Select Costco locations have the Buffalo David Bitton Men’s Knit Boxer 3-Pack on sale for $10.99 (after… 0 FacebookTwitterPinterestEmail