A best bet is the i jeans by Buffalo Men's Colored Denim Pants in Genuine Co (pictured) for $32 before the above coupon, $25.60 after. With $8 for shipping, that's $24 off list and the lowest total price we could find. They're available in most sizes from 29x33 to 40x33.
Of note, the same discount is available in-store via this printable coupon.
A best bet is the Carhartt Men's C001 Chore Coat in Brown (pictured) or Black for $70 before the above coupon, $56 after. With $8 for shipping, that's the lowest total price we could find by $7. It's available in regular sizes S to XXL. (It's also available in big and tall sizes for $5 more.)