Ending today, Gap offers its Gap Men's Performance Slim Fit Khakis in four colors (Pavement pictured) for $45.46. Coupon code "EXTRA" cuts it to $34.09. With $7 for shipping, that's $31 off and the lowest total price we could find. They're available in lengths 28 to 36 and waist sizes 28 to 42, although not in all size/length/color combinations.