13 Deals offers the Reebok Men's RBK Fitness Shorts in Black or Navy for $9.49 with free shipping. That's tied with our mention from a week ago as the lowest total price we've seen. (It's a current low for such a pair by $3.) They're available in sizes L XL to XXL, although not in all size/color combinations.
L.L.Bean offers the L.L.Bean Men's Double L Chino Shorts in Deepest Red and Marine Blue for $19.99 with free shipping. That's $15 off list and the lowest total price we could find. They're available in sizes 30 to 36, although not in all size/color combinations.