At Tire Rack, buy four select winter/snow tires and get a $50 Prepaid Mastercard for free via this mail-in rebate. (Click "Special Offers" from the "Tires" drop-down menu, then select the "Winter/Snow Tires" option.) Then, in March, you'll receive a $50 Tire Rack Gift Card to be applied toward four warm weather tires. (These tires will have to be the same brand as the winter tires you choose.) Combined, that's a total savings of $100. Deal ends September 26.