REI Outlet offers the ExOfficio Men's Give-N-Go Sport Mesh 9" Boxer Briefs in several colors (Curfew pictured) for $21.73. Choose in-store pickup to avoid the $5.99 shipping fee. Outside of the seller below, that's the lowest price we could find by $3. They're available in select sizes from S to XXL.

Wear size L? Amazon offers them in Black for $21 $23 with free shipping for Prime members.