At a discount tire location, you can find tires at significantly discounted prices. One way in which this is made possible is by selling second hand tires. Naturally, they will have been fully checked and, mainly, they will be inflated to the correct pressure. Do also find out the right pressure for your particular tires is so that you can check it yourself whenever you go for gas. The price of air is cheap, after all, but the price of an accident is huge.