Retail Fashion Outlet via eBay offers the Wrangler Men's Relaxed Fit Twill Cargo Shorts in Beige or Blue for $13.99 with free shipping. That's the lowest price we could find by a buck, excluding the mention below. They're available in sizes 32 to 42.

A close price: Target have them in Bullfrog for $14.39 with free in-store pickup, although sizes are limited.