Today only, Lands' End offers its Lands' End Men's University Coat in Regiment Navy for $79.99. Coupon code "SAVE30" and PIN "9455" cut the price to $55.99. With free shipping, that's $123 off and the lowest total price we could find. It's available in regular sizes S to L.
Of note, it's available in tall sizes for $62.99 with free shipping, after the above coupon.