Today only, Kmart takes an extra 5% to 10% off most items during its Groundhog Day Sale. That's among the best sales we've seen from Kmart in recent months. (We saw 5% to 15% off two weeks ago.) Shipping starts around $5.50, or get free shipping on orders over $49 via coupon code "SHADOW." (Free in-store pickup is also available.) Sales tax is added where applicable and some exclusions apply.