Under Armour via eBay offers its Under Armour Men's Not Your Bro Shorts in Black/White for $17.50 with free shipping. That's $17 off list and the lowest total price we could find. They're available in size S to XXL.
American Apparel via eBay offers its American Apparel Women's California Fleece Shorts in four three colors (Red pictured) for $4 with free shipping. That's the lowest total price we could find by $14. They're available in select sizes from XXS to XL, although not in all size/color combinations.