REI offers the Patagonia Men's Tenpenny Pants in Khaki or Grey for $68.93 with free shipping. That's the lowest price we could find by $30, outside of the mentions below. They come in sizes 30x30 to 40x34.

Meanwhile, Moosejaw has them in size 28 for $49.99 with free shipping; Patagonia has them in long sizes in Green for $49 plus $8.50 for shipping.