On one hand, when you consider the amount of engineering that goes into tires and how much wear they're built to sustain, $144 per tire for something that's not absolute garbage is not that bad of a deal.
On the other hand I just spent over $350 getting my front two tires replaced (after spending $100 getting my oil changed) and I'm in physical agony.
I wish I didn't have to own a car to do anything, geez!