Walmart takes up to 40% off a selection of its online specials, including tablets, HDTVs, toys, home items, and more, with deals starting from 28 cents. Shipping adds $4.97, or bag free shipping on orders of $50 or more. (Site-to-store pickup is also available on most items.) Some best bets: Orders placed with value shipping today, December 17, are guaranteed to arrive in time for Christmas.