It's more annoying to have to change them, but as someone who bought some long ago, it was cheaper than new, The last time I got my tires changed, I paid $24 f

It's more annoying to have to change them, but as someone who bought some long ago, it was cheaper than new, The last time I got my tires changed, I paid $24 for mounting and balancing each one. Low end new tires cost around $60, so even if the used tires were free, it wouldn't take many changes for them to be more expensive. Plut it takes a couple hours to drive to the tire store and wait around to get them changes, so that's a cost too. But I didn't buy the cheap $60 tires, I bought the $100 tires with longer treadwear warranty and better performance in rain/snow... another advantage of having more money - I can reduce my chance of getting into an accident by spending more on better tires.