Walmart offers a $5 to $20 Walmart Gift Card with purchase of a select Sonicare Toothbrush or Brush Head Refill Pack. (The value of the gift card you'll receive is as marked.) Plus, orders of $35 or more (after subtracting out the gift card's value from the purchase price) qualify for free shipping; otherwise, it adds $5.99. (In-store pickup is also an option for most items.) A couple of best bets, each with free shipping: