So, I realized the other day that one of the tires on SWMBO's car is showing the steel belts. I need to replace it tomorrow, but we're looking at trading in the junker on a newer something or other in the not so distant future. I don't want to put a bunch of money into 2 tires, so how common is it to buy just one tire? Do places sell used tires? I don't think it'll have to last more than about 2 or 3 months, so a new tire is kind of a waste. What do you all think?